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E20-895 - Backup Recovery - Avamar Expert for Implementation Engineers - Dump Information

Vendor : EMC
Exam Code : E20-895
Exam Name : Backup Recovery - Avamar Expert for Implementation Engineers
Questions and Answers : 211 Q & A
Updated On : December 14, 2018
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E20-895 Questions and Answers

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E20-895 Backup Recovery - Avamar Expert for Implementation Engineers

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E20-895 exam Dumps Source : Backup Recovery - Avamar Expert for Implementation Engineers

Test Code : E20-895
Test Name : Backup Recovery - Avamar Expert for Implementation Engineers
Vendor Name : EMC
Q&A : 211 Real Questions

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EMC EMC Backup Recovery -

EMC Backup and recovery patrons e book | killexams.com Real Questions and Pass4sure dumps

EMC was once all about disk arrays. round 10 years returned, it embarked on a technique to cover the total storage market, together with backup application and recovery. This manifests nowadays in the EMC Backup and restoration methods (BRS) division. as well as utility, this unit offers deduplication and backup appliances and lots extra.

according to BJ Jenkins, BRS techniques president, there are five separate areas in BRS:

  • records domain, which is primarily commonly used for deduplication at the goal
  • Avamar, customary for deduplication on the supply
  • NetWorker, for backup utility
  • Disk Library, for backup for mainframe environments
  • Disk insurance policy guide (DPA), which is a tool to check and enhanced manager backup environments
  • Jenkins cited that deduplication has been regularly ingesting away on the tape market, which has fallen from an 11.9 % share of the exterior storage market within the 1999 to 4.6 p.c in 2010, based on IDC. The fastest starting to be area of the backup market is intention-constructed backup appliances, which IDC observed have grown right into a $1.6 billion market with EMC possessing 64 %. as a result, EMC has risen to No. 1 in backup, forward of Symantec and IBM.

    EMC Disk Library http://o1.qnsr.com/log/p.gif?;n=203;c=204655439;s=10655;x=7936;f=201806121855330;u=j;z=TIMESTAMP;a=20400368;e=i

    EMC Disk Library is a heavy-obligation VTL product. The DL5200 has a beginning fee of $400,000. When utterly configured at 686 TB, that can rise to over $2 million. The business positions it as enabling the backup of information that does not lend itself to high charges of deduplication due to records constitution or retention policies. EMC Disk Library for mainframe (DLm) is a backup gadget designed for the mainframe environment that leverages facts area deduplication know-how. The DLm has a starting fee of $337,000. When completely configured at three.eight PB of logical capability, that can upward push to over $2 million.

    EMC NetWorker

    Networker came to EMC in the course of the Legato acquisition in 2003. it is a normal backup utility that works with lots of of enterprise apps. Jenkins described it as a full-carrier backup, combining disk and tape backup capabilities. if you use tape, Networker is the EMC answer to deploy. The Networker company may go away, youngsters.

    "Networker and Avamar are coming together over time," talked about Jenkins. "each use enhance, which came from statistics area."

    enhance changed into designed to circulate the majority of the work from the target device upstream to the backup media server. It thereby reduces the load on the backup server and frees up greater bandwidth. The rationale: previously, a whole backup changed into transmitted over the network to a deduplication appliance, which then sorted out which files to retain and which of them were already kept. therefore, best data that goes to be kept on a backup appliance is relayed over the wires.

    those using NetWorker backup software now have increase protected as a free addition. once installed, any facts domain packing containers in the LAN will appreciate it. extra, IT administrators can log onto NetWorker and handle deduplication and replication at once from the NetWorker console.

    greater recently, NetWorker's capabilities have been extended to supply excessive efficiency and virtual server software protection. NetWorker edition 7.6 SP2 offers assist for vStorage API for records protection (VADP) to integrate with a VMware virtual infrastructure.

    NetWorker Module for Microsoft functions 2.three additionally offers aid for change and SharePoint Server 2010, plus windows Server 2008 R2 and home windows DR.

    EMC Avamar

    EMC Avamar is awfully a great deal a fabricated from a disk-based mostly world. Designed only for disk, it deduplicates data on the supply earlier than it's transmitted to the backup server or storage media.

    "Use situations center of attention on far flung workplace/branch workplace (ROBO), NAS, backing up of computers, laptops and VMware environments," mentioned Jenkins. "It offers broadly speaking in file facts."

    He explained that Avamar relieves stress on the network via deduplicating information earlier than you ship it anyplace. it is accessible as application-most effective or as an equipment.

    recent tendencies include integration with records domain methods, developments for VMware and VCE vBlock backup and guide for the EMC VNX family. The latest hardware edition of Avamar normal because the Avamar information store doubles ability to 124 TB per system.

    EMC facts domain

    Like Avamar, data domain became additionally purpose-constructed for disk -– this time as a backup appliance. It contains variable deduplication -– what this capability is that it will possibly deduplicate information or sections of files all the way down to 8k or 15k segments. That helps lots in minimizing traffic. in case you make a minor tweak to lots of info, some deduplication items will relay all of each and every file or a pretty good element of it. With statistics domain, handiest the small modified segments are transmitted.

    "now not all deduplication is the same," noted Jenkins. "With variable size and inline processing, we've industry leading performance and scale."

    He added that the main use situations for information area are databases, email, transactional tactics, huge files, Sharepoint and different Microsoft applications, Oracle, and SAP.

    There are seven products in the information domain family. The DD 610, DD630 and DD670 are deduplication home equipment. The DD610, as an instance, can hold up to six TB and has a beginning price of $20,000.

    The DD860 and DD890 are controller handiest products. The latter has a starting fee of $300,000 and might deal with 384 TB of records. The beginning price is $750,000 for a world Deduplication Array, which could hang up to 768 TB. information area Archiver helps as much as 768 TB of uncooked exterior storage. It will also be configured with up to 128TB of raw storage in the active tier, and the ultimate exterior storage within the archive tier. The entry DD Archiver controller has a U.S. list fee of $160,000.

    records insurance plan advisor

    facts insurance plan advisor is a device to help assess the backup atmosphere. It includes reporting of such objects as how lengthy the backup took and if it become a success. moreover, DPA gives scheduling and management elements. EMC has built-in DPA with EMC Unisphere, which will also be used to manipulate numerous EMC gadgets.

    "DPA helps you to dimension the ambiance, take into account the have an impact on of deduplication and see how tons potential you need," mentioned Jenkins. "it is mainly for higher environments."

    The latest edition of DPA has guide for Avamar 6.0 and NetWorker 7.6 SP2, together with new reporting points and skill-primarily based licensing.

    Drew Robb is a freelance creator focusing on technology and engineering. presently living in California, he's at the start from Scotland, the place he obtained a level in geology and geography from the institution of Strathclyde. he's the creator of Server Disk administration in a windows environment (CRC Press).

    follow business Storage discussion board on Twitter


    EMC NetWorker Drives Backup Transformation | killexams.com Real Questions and Pass4sure dumps

    EMC supplier introduced that EMC NetWorker enterprise backup application users are deploying built-in options from EMC to complete extremely successful backup redecorate projects. Dramatically faster backup and recoveries, simplified administration, reduced local network site visitors, automated disaster restoration, tape removal and cost savings are among the many merits these users are reporting. proven customer success is a testament to the endured enhancements EMC has made to NetWorker, which can be enabling users to address their data insurance plan needs with standard-to-manipulate, subsequent technology backup and recovery solutions.  

    Shane Jackson, vp, marketing, EMC Backup recovery programs Division spoke of that EMC embarked upon a mission to integrate its entire portfolio of backup and recuperation products when we shaped the Backup healing techniques division 2 years in the past. The tightly integrating backup hardware and software would deliver potent capabilities and advantages to shoppers as they re-architected their IT infrastructures to address information boom, virtualization initiatives and an increasingly intolerable set of management complexities.  the combination of NetWorker and data area products by way of statistics area raise utility was just one of the initiatives undertaken.  today, with ongoing enrichment of NetWorker elements and performance, purchasers are leveraging NetWorker to create incredibly automated, disk-primarily based backup and healing infrastructures.  These remodel efforts are enabling consumers to decrease backup instances, recuperate facts all of a sudden, and successfully replicate backup information for disaster restoration using current network components.  No competitor offers the level of integration or breadth of backup portfolio that EMC brings to the table.

    Panattoni know-how group is a California-based mostly outsourced company of IT capabilities to Panattoni business true estate and building groups globally.  The enterprise first deployed NetWorker to consolidate its disparate backup structures.  at the moment the business turned into still backing as much as tape and using third celebration tape management capabilities that had been proving to be increasingly complex when restores had been required.  because the enterprise began to virtualize its data core ambiance, it called in 4 distinct vendors to present disk-based mostly backup options that used deduplication and decided that EMC information domain® became the optimal and strong answer.   Panattoni deployed its first records domain gadget in its European records middle and built-in this equipment with NetWorker by the use of DD increase application.   presently after, they did the equal in their basic u.s. statistics core.  next, cross site replication between both information facilities was implemented for catastrophe restoration.  

    today, Panattoni retains 320 terabytes of backups on simply 15 terabytes of data domain disk capacity and its global full backup window has been reduce in half to simply 12 hours.  Time spent administering backups has dropped to essentially zero, and all facets of their statistics coverage are enormously automated and centrally managed from a single NetWorker console.

    Kris Jensen, Director of Infrastructure, Panattoni technology neighborhood stated “I cannot overstate how easy it now could be for us to address our backup and replication strategies with NetWorker and information domain built-in by way of DD raise utility. management time for records coverage has been reduced to nearly zero.  truly, NetWorker and information area are actually so tightly wound collectively that I examine them as a single solution.  I’ve already suggested NetWorker integrated with statistics area to peers at different groups because it’s been rock solid.  every thing is sooner, with absolute improvements across the board.”

    Randy Forgeur, Senior community Administrator, Panattoni expertise neighborhood talked about “From NetWorker, i can create all backup routines, installation cloning projects, and investigate which pieces of facts I want to send from our European operation to the us. I don’t ought to contact tapes, or be anxious about backup nice.  additionally, I don’t should go to multiple areas to see that my backups and replication have accomplished correctly.  It’s all on the NetWorker console. Twice every week I stroll in, be sure it’s set up, and ignore it. It’s that reputable.”

    A&N Media, the purchaser media enterprise of DMGT plc., is a well-liked UK-based mostly media organization this is in the system of evolving its IT infrastructure to a cloud-based mostly mannequin.   The business’s IT group, A&N Media IT functions, initiated a complete backup redesign to get rid of tape, in the reduction of prices, improve reliability and dispose of the executive burden associated with greater than 1,seven hundred tapes.  NetWorker become the one element of their current infrastructure that they determined to preserve.  A&N Media leveraged their lengthy standing investment in NetWorker to architect a new backup and recovery infrastructure that covered a data area DD670 deduplication storage gadget integrated with NetWorker by the use of DD raise software.  in addition to faster, extra legitimate backups, a tremendous effect of this task is that the EMC backup and restoration solution enabled A&N Media to put in force a network-based mostly catastrophe recovery method with replication between two information facilities within the London enviornment.  

    grant Altson, techniques supervisor, A&N Media observed that the aggregate of NetWorker and records area has delivered a dramatic improvement in our backup and recovery success rate, and with DD increase utility we’ve seen reduced internal network bandwidth consumption, because DD enhance distributes parts of the deduplication procedure to the storage node.  

    "Our historic tape-primarily based environment couldn't sustain with our records increase and carrying on with on with a tape changed into without problems now not a practicable path for us.  It’s great to look EMC carrying on with to put money into NetWorker and integrating it with products like statistics domain.  the mixing of the EMC backup and restoration portfolio has revitalized our interest in using NetWorker as a basis as we evolve our backup infrastructure," observed Altson.

    EMC NetWorker commercial enterprise backup application provides seamless integration with the business’s two leading facts deduplication options:  EMC statistics area and EMC Avamar®.  Integrating NetWorker with EMC backup and recovery items allows for shoppers to lengthen the power of NetWorker to handle distinct and evolving business backup and healing needs from a standard administration interface. 


    Dell EMC Avamar | killexams.com Real Questions and Pass4sure dumps

    Dell EMC Avamar is a hardware and application statistics backup product.

    Avamar began as a non-public company and become among the first providers to promote statistics deduplication application for backup information. EMC obtained Avamar for its deduplication technology in 2006, more than a decade earlier than Dell's blockbuster acquisition of EMC.

    Dell EMC Avamar can be used in numerous statistics storage environments, and is attainable in built-in hardware and application or application-simplest alternate options. Avamar utility gives supply-primarily based deduplication, decreasing statistics at the server earlier than the data is moved to the backup target. this is distinct than the Dell EMC information area platform that performs target-based deduplication at the disk backup appliance.

    Avamar backups

    Dell EMC Avamar performs full each day backups. protecting daily finished backups allows for a single-step restoration technique.

    All Dell EMC Avamar deployments use variable length facts deduplication to in the reduction of redundant copies, which shortens backup home windows and cuts returned on bandwidth use by way of handiest storing enjoyable adjustments. In far flung environments, Avamar can use present native area community and large area community bandwidth. Avamar makes use of RAID and RAIN know-how to in the reduction of redundant records and enhance fault tolerance.

    Use cases

    Dell EMC Avamar has a wide selection of use instances counting on the environment it's utilized in. consumers can use Avamar for:

    Avamar for backup and recuperation

  • Virtualized environments
  • NAS backups
  • Laptops and desktops
  • far off office backups
  • business-crucial applications
  • Cloud catastrophe recovery
  • Deployment alternatives

    Avamar may also be used with quite a lot of applications, with utility modules for items from other carriers equivalent to IBM, Oracle, OpenStack and Microsoft.

    Dell EMC Avamar has four diverse deployment alternatives, counting on the buyer's hardware preferences or purchasable elements:

  • Avamar facts shop combines Avamar software and a goal-constructed backup equipment as a one-cease, built-in product. This option is most beneficial for those looking to cut down on setup time and prevent working to integrate the Dell EMC utility with different hardware providers. Avamar statistics store can be scaled to 124 TB of deduplicated means.
  • Avamar virtual version includes the backup software and a virtual equipment, which may also be deployed in Azure, Hyper-V or vSphere.
  • Avamar business edition is designed for midmarket corporations that may be coping with constrained resources. The enterprise edition contains a purpose-built backup equipment and simplified administration.
  • Avamar can also be built-in with a physical Dell EMC information domain gadget for added scalability and efficiency.

    administration

    Avamar servers are managed via a single centralized console. As with the vendor's information domain system, Dell EMC Backup and recovery manager is used to handle and video display Avamar. No license is required to installation Backup and recovery manager for Avamar.


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    How to Securely Get Rid of Your Devices | killexams.com real questions and Pass4sure dumps

    This article originally appeared on VICE US

    The rapid development of technology has had a direct effect on the lifespan of consumer electronics in recent years. Device makers have an economic incentive to shorten product life cycles, but technology enthusiasts who want to have the latest and greatest gadgets also contribute to the trend.

    Replacing phones and laptops every couple of years increases the privacy and security risk to consumers because many users don't properly wipe data from their devices before selling or disposing of them. That's not completely their fault as securely erasing data from modern devices is not as straightforward as one might think.

    Read on to find out why that is and how encryption can help mitigate those risks. Also, is selling your old devices a good idea or is it better to simply destroy them?

    What’s your threat model?

    Deciding how to get rid of a laptop, phone, or storage device in a way that doesn't risk stored data being compromised really depends on who's likely to be interested in that information and the length they might go to obtain it.

    The recommendations in this article are generally aimed at users who would want to protect their data from a regular cybercriminal or a curious buyer. Such individuals are unlikely to have the resources, skills, or even the interest to attempt sophisticated and time-consuming data recovery procedures. There’s simply not a big enough return on investment.

    Data sanitization is about risk mitigation: What is the value of the data you are trying to destroy and what are the resources of whoever might attempt to access that data?

    "For most consumers, it's probably enough just to make sure that they're not a low hanging fruit; that the effort it would cost to attempt to recover the data from the drive far exceeds the value of the drive itself and it's just easier to sell it for parts or put it back into service," said Greg Andrzejewski, the director of research and development at Gillware, a data recovery company whose services are used by Dell, Western Digital and other technology companies.

    On the other hand, if you're a political activist in a country with a repressive regime or a senior executive in a high-profile corporation, the resources and motivation of the people who might target you will be significantly different than what a regular consumer could face. In that case, it's best not to sell your old devices or to take them to recycling centers that might recondition them and put them back into circulation.

    "The user has to think: What's the worst case scenario if someone did access a partial set of my data?" said Nathan Little, director of product development at Gillware Forensics, the digital forensics arm of Gillware. "Is that worth me selling my phone for $50 or is it safer for me just to keep it or physically destroy it and throw it in the dumpster?"

    Encryption

    Before we talk about data wiping, we should talk about encryption, because the best way to minimize data privacy risks when selling a laptop, a mobile phone, or some other computing device is to turn on disk or storage encryption as soon as you start using it.

    This will ensure that even if there’s some leftover data when you dispose of the device, it will be useless to someone who doesn't have the decryption key or the password that unlocks that decryption key. And, of course, encryption will also protect your data if the device gets lost or stolen.

    All major desktop operating systems support full-disk encryption. MacOS has FileVault, Linux has LUKS (Linux Unified Key Setup-on-disk-format) and Windows has BitLocker in the Pro and Enterprise versions and a more limited version called Device Encryption in Windows Home, if the device has a Trusted Platform Module (TPM) 2.0 dedicated crypto chip. There are also third-party open-source tools like VeraCrypt that can encrypt both external disks and the primary drive hosting the OS.

    Some of these solutions will encrypt the master decryption key with the user’s login password or with a separate password that needs to be entered when the system boots up, and will store it in a special region of the drive itself. Because of this, it’s important to use a long and hard-to-guess passphrase that cannot be easily cracked using brute-force methods.

    It also means that you should still wipe the storage device before selling or recycling it even if the data on it is encrypted. This will ensure the password-protected encryption key stored on the drive will be deleted and the data will be lost forever.

    Some storage devices are self-encrypting, their internal controllers using a specialized chip and firmware to encrypt data before writing it to the drive. However, these encryption implementations are not open-source or publicly documented, so it's hard to know whether they work correctly or not.

    In fact, a 2015 study of several external Western Digital hard disk drives (HDDs) with self-encrypting capabilities found serious implementation flaws that could have allowed attackers to recover data or decryption keys. The drives used USB bridge controllers that handled the cryptographic operations from different manufacturers, so the problem is not limited to a single vendor.

    The conclusion is that even if you have a self-encrypting drive (SED), it may still be a good idea to use another encryption solution on top of it to secure the data. The encryption features of modern operating systems are widely used and have been scrutinized by many security researchers over the years. VeraCrypt—a fork of the now-abandoned TrueCrypt software—has also been audited by security experts.

    Even if you just realize the importance of full-disk encryption now, it's not too late to turn it on. The sooner you do, the less likely it is that someone will be able to recover data from your device when you sell it or take it to a recycling center.

    But make sure to backup the recovery keys that your encryption software generates in a safe place and also back up your important files regularly, preferably to a secondary encrypted disk. If your drive fails before you dispose of it, no data recovery company will be able to help you if you don't have the recovery keys to your encrypted partitions.

    Wiping hard disk drives

    Hard disk drives store data on rotating disks called platters that are coated with magnetic material. They have been the standard storage medium in the computer industry for decades and are well understood, so various methods of "sanitizing," or securely erasing, data are available for them.

    There is even a command in the ATA specification—the standard communication interface between computers and disks—called SECURITY ERASE UNIT, or more commonly known as Secure Erase, that HDD and solid-state drive (SSD) manufacturers can implement. Executing the Secure Erase command on either a HDD or SDD will destroy data from all internal locations, returning it to a factory default state.

    Windows

    First, it's worth noting that the default quick format operation built into Windows does not actually destroy data. It only clears the file system, which is an index of records that hold information about files and their physical locations on disk. A quick format will mark the mapped physical locations as free space that’s available for reuse, but the old data will remain in the physical sectors until it will slowly be overwritten by programs in the future. As such, a quick format doesn't count as data sanitization for devices intended to be discarded.

    Microsoft does provide the option to overwrite all of a disk’s sectors with zeroes, which will make it almost impossible, or at least commercially unsustainable, for data recovery firms to restore any usable data. This a functionality of the DiskPart command line utility, implemented as a “clean all” command.

    To use DiskPart against the primary disk that holds the operating system, you will need to boot from Windows installation media (CD or USB stick) and enter the recovery environment. Once there, you should select the Command Prompt option and then type “diskpart” to enter the DiskPart utility.

    The “list disk” command will list all available disks with a number (0, 1, etc.) that identifies each of them. Once you identify the disk you want to wipe from the list, type “select disk #”, where # is the number that corresponds to that disk. Then type “clean all” and be patient, as the operation can take a long time.

    Double check that you selected the correct disk, as the operation is irreversible. And also note that executing only the “clean” command, without the “all” parameter, will only destroy the first sector of the disk, which contains information about the disk partitions, but will not overwrite all sectors with zeroes.

    HDD makers provide their own specialized diagnostics programs such as Seagate SeaTools or Western Digital Data Lifeguard Diagnostics that include secure data erase, or zero-fill, functionality. This is also known as a zero-fill because it overwrites all of the disk’s sectors with zeroes, returning it to its factory default state.

    These vendor tools usually come in two versions: One that can be installed on Windows as a regular application and a DOS-based version that must be run from a bootable CD or USB stick. The latter is needed to erase a computer’s primary disk which contains the operating system, because you can't wipe an HDD from inside an OS that’s actively running from it.

    To create bootable CDs or USB sticks with such tools, users will have to follow the instructions provided for each tool. However, there’s an easier solution: There are community-maintained boot CDs that contain collections of system recovery, administration and diagnostic tools, including the utilities provided by HDD manufacturers and which can be hard to get nowadays because some drive makers have been bought by competitors over the years and their old websites and download links have disappeared.

    The actively updated Ultimate Boot CD (UBCD) is one example and it can be written to a USB thumb drive with tools such as Rufus or the Universal USB Installer. It also bundles other popular third-party data wiping tools like Darik's Boot and Nuke (DBAN), a program that implements more complex wiping routines like those specified in data sanitization guides from the US Department of Defense and other government agencies.

    These standards require sensitive information, such as government confidential data, to be wiped by performing multiple rounds of full-disk overwrites using various data patterns, but they can take a very long time and are most likely overkill for regular users.

    MacOS

    The Disk Utility in macOS (formerly OS X) provides multiple data erasure options for HDDs under “Security Options” including multipass overwrites that conforms to the DoD 5220.22-M specification.

    Inside MacOS the Disk Utility can be found under /Applications/Utilities/ and can be used to erase externally attached drives. To wipe a disk that contains the macOS boot volume, users can boot into Recovery mode and use Disk Utility from there. Note that the secure erase options will not be available for SSDs.

    Solid-state drives (SSD)

    When it comes to the solid-state drives that have replaced HDDs in many modern laptops, such as MacBooks and Windows ultrabooks, things get more complicated. These drives store data in flash memory chips rather than on magnetic platters and use complex storage management algorithms that make traditional data wiping methods like zero-fill or multipass overwrites much less reliable.

    SSDs have an internal flash translation layer that maps logical block addresses (LBAs) used by file systems, to pages, which are rows of physical cells in the memory chip. A block is made up of up to 256 memory pages.

    When applications want to overwrite existing data, SSDs do not perform an in-place update of the physical pages that contain the old data. Instead, they write the new data to empty pages because it's faster and to ensure an even wear of all memory cells. Then the SSD's flash translation layer updates the LBA internally so that programs see the new version of the data at the same location as before.

    This performance-enhancing trick causes old versions of the data to remain behind in what will now be considered stale pages. These will eventually be cleared when the other pages that make up the same block will also become stale or when their data will be intentionally moved to empty pages in other blocks.

    This process is known as garbage collection and is necessary so that entire blocks can be erased and put into use again. It's also the reason why SSDs are over-provisioned with spare blocks and why the TRIM command, which allows the OS to alert the SSD about invalid pages, was introduced.

    Windows

    For most consumers, the easiest solution to wipe an SSD is to identify its make and model and then use a utility provided by its manufacturer to execute an internal Secure Erase command (Intel, Samsung, Toshiba OCZ, SanDisk, Kingston, Crucial, Western Digital, Seagate, Corsair). Like with HDDs, this has to be performed from outside the operating system and will be executed by the firmware.

    Most of the SSD management applications provided by SSD makers need to be installed under Windows first and will have an option in their interfaces to create a bootable USB stick with a separate utility for secure erasure.

    Third-party tools for executing the ATA Secure Erase command on both HDDs and SSDs include Parted Magic, a previously free bootable CD for partition management that now costs $11 to download, and HDDerase, a bootable DOS-based utility originally developed at the University of California San Diego’s Center for Memory and Recording Research, but which hasn’t been updated since 2008 and might not work with some drives or some configurations.

    The previously mentioned Ultimate Boot CD includes both HDDerase and the last free version of Parted Magic dating from 2013. Parted Magic is the better option because it has a graphical user interface for Secure Erase, but the last freely available version included in Ultimate Boot CD has some known issues that could brick drives and which have been resolved in later paid-only versions. The Linux hdparm utility can also be used to issue an ATA Secure Erase command, but is quite fiddly to use and comes with many warnings.

    One important thing to keep in mind is that using the ATA Secure Erase command requires setting a user password for the target drive first. Choose something simple and easy to remember and never enter an empty password because certain BIOSes do not recognize NULL passwords and will no longer let you use that drive.

    It’s also not advisable to use Secure Erase on external drives that are connected to a computer over USB because USB-based interfaces might not support the command and there have been reports of bricked storage devices.

    Overwriting the entire SSD multiple times can be an alternative to Secure Erase, but such an operation can take many hours and even days to complete, depending on the drive's size, and is not always reliable. There's also a risk of drive failure due to the intensive workload.

    MacOS

    The secure erase options offered for HDDs by macOS’ Disk Utility are not available for SSDs. Apple says in its documentation that these options “are not needed for an SSD drive because a standard erase makes it difficult to recover data from an SSD."

    However, difficult doesn't mean impossible, which is why the company also recommends turning on FileVault encryption when you start using your SSD drive for better security.

    Caveats

    Using manufacturer-provided tools to perform data wiping, especially the Secure Erase command, is probably the safest choice because these companies supposedly know best how their products work internally. However, there have been documented failures in such tools over the years.

    In 2011, researchers from UC San Diego set out to study the effectiveness of common data sanitization techniques on SSDs and found serious issues with the implementation of the ATA Secure Erase command. Of 12 tested SSDs from different manufacturers, only eight supported the command and of those, only four executed it reliably.

    On two drives, attempts to execute the command returned an error and only the first block was deleted. Even more worryingly, one drive reported successful command execution without actually deleting any data at all.

    The study also found that fully overwriting SSDs twice was sufficient to sanitize most, but not all of them. For example, the researchers were able to recover 1GB of data, or around 1 percent, from one of the tested drives even after 20 overwrite passes by using specialized equipment attached directly to the drives’ memory chips.

    The per-file sanitization methods that typically work on HDDs and which involve overwriting a file's physical location on disk multiple times with random data proved completely inefficient on SSDs. The researchers were able to recover between 4 percent and 75 percent of the contents of files sanitized using such methods.

    Steven Swanson, the director of the Non-volatile Systems Laboratory at UC San Diego and one of the researchers behind the study, told me in an interview that he expects things to have improved since 2011, partly because their paper attracted a lot of attention at the time and put pressure on SSD makers to fix things. He believes that new SSDs from reputable manufacturers should have proper implementations of the Secure Erase command nowadays.

    "If you're using a reputable piece of software to erase your SSD, I would trust it, if I was going to sell an SSD," he said.

    After an erase operation, a bootable live Linux environment can be used to check at a high level that the drive no longer has user data on it. Small pieces of information might still exist in the memory chips and wouldn’t be visible to such a test, but they wouldn't likely be of much use to a cybercriminal.

    Extracting that information in the first place would require specialized equipment that can read flash memory chips without relying on the SSD’s controller and this is not something that a random cybercriminal or a curious buyer would attempt doing.

    Another problem is that SSDs sometimes fail without warning, and not because their memory cells wear out, which is something that eventually happens to all flash-based storage over time. Different experts who have put SSDs through heavy testing have told me they've had cases where the drives suddenly stopped working and had to be thrown away.

    "There are lots of other electrical components in there,” Swanson said. “The software that runs inside the SSD is very complicated and if it gets into a bad state, there's nothing really to be done and the SSD will just stop. That's a much more likely failure than flash chips going bad."

    Rutger Plak, a senior digital forensics expert at Dutch security firm Fox-IT, told me that he and his colleagues performed some non-academic data erasure tests on SSDs to see if they could be used internally for their work instead of HDDs—for example for collecting evidence from customer machines during digital forensics and incident response engagements. They ended up deciding against the idea because of reliability issues.

    The goal was to see if any data written to the drives could still be recovered after using the standardized multipass overwriting schemes that are commonly used to sanitize disks, Plak said. "A lot of SSDs broke when we tried to securely erase them or when we tried to write too much data too them."

    Mobile devices

    In some ways, things are simpler with mobile devices, even though they also use flash-based storage chips that have the same pitfalls as SSDs when it comes to data wiping.

    Recent versions of Android and iOS support full-device encryption, and many have it on by default, but this is a relatively new development and there are still a large number of phones in active use that are not encrypted, especially in the Android ecosystem.

    Android data wiping

    Android has a factory reset feature which formats the data partition that contains sensitive information and settings stored by applications and the OS. Phones that support removable microSD cards usually have a separate option for erasing and formatting the external storage.

    Securely wiping data from older Android devices that don't support full-disk encryption is problematic, as shown in a 2015 study by researchers from the University of Cambridge. The researchers analyzed the efficiency of the factory reset implementation in 21 second-hand phones running Android versions between 2.3 and 4.3 and found that they could recover emails, text messages, Google access tokens and other sensitive data.

    Basic full-disk encryption was added in Android 4.4 and the feature was further improved in Android 5.0. However, turning it on by default was not mandatory for Android device makers until Android 6.0 and even then the requirement only applied to new devices that shipped with that OS version and not for older ones that received it though a software update.

    Low-end devices that don't support Advanced Encryption Standard (AES) performance above 50MiB/sec were exempted from the requirement and those exemptions still apply today for Android 8.1. According to the latest official statistics, only around 68 percent of Android devices that accessed the Google Play store over a 7-day period in late July were running Android 6.0 or newer.

    Fox-IT’s Rutger Plak told me that his company received many reports over the years from people who performed a factory reset on their Android devices then sold them and had their sensitive information stolen.

    If an Android phone that doesn’t use encryption gets factory reset and you can access its storage chip or card, then recovering data is very easy, Plak said. "There's a lot of software online for data recovery that is simply point-and-click and is very useful for recovering accidentally deleted files. However, if we think about it in terms of unsuspecting device sellers, then it's quite scary."

    "I'm afraid that if you have an old Android phone, my advice would be not to sell it," Ross Anderson, a professor of security engineering at the University of Cambridge Computer Laboratory, told me via email. "You really need to know what you're doing to wipe the data, as factory reset often doesn't work properly."

    Plak agreed that selling old Android devices is not a good idea and that using full-device encryption is the best way to prevent data recovery on newer devices. However, he also pointed out that it's very important to set a strong unlock passcode on the device, because the security of the data, even when encrypted, depends on that access code.

    iOS data wiping

    As the sole maker of iOS devices, Apple has full control over the iOS ecosystem and does a good job of updating its users’ iPhones and iPads to the latest version of the OS.

    The company added full-device encryption in iOS 8 and it's turned on by default. Also, starting with the iPhone 5S, iOS devices have a security coprocessor called the Secure Enclave that handles cryptographic operations and stores the encryption key.

    This dedicated processor also prevents brute-force attacks against the phone's passcode by increasing input delays after each failed unlock attempt. That said, there are currently specialized devices marketed to law enforcement agencies that can reportedly crack 6-digit passcodes in up to three days, so users should strongly consider using longer alphanumeric codes.

    All iOS devices can be reset to factory settings by connecting them to a computer and using Apple’s iTunes software. Devices can also be erased without a computer from the Settings > General > Reset menu.

    Physical destruction

    If a mobile phone, hard drive or SSD contains data that's very sensitive, then it's probably best not to sell it. Storing it in a safe place from where it cannot be easily stolen or thoroughly destroying it so that data cannot be recovered are probably the best options.

    There are businesses that specialize in destroying storage devices and they will even provide a certificate of destruction, but their services are typically aimed at corporations and can be quite expensive.

    Destroying an HDD is relatively easy. Drilling holes or driving a few nails through its casing to damage the platters inside will usually be enough. Of course, safety gear should always be used when performing such operations.

    Drilling holes through platters, bending the platters or breaking the platters into multiple pieces are very successful HDD destruction methods, Gillware’s Nathan Little said.

    "That's going to put the data unrecoverable by any commercial data recovery lab," Little's colleague Greg Andrzejewski said. "In theory, you might be able to read something back with some very specialized equipment, like a scanning electron microscope, but the way for-profit data recovery labs work is we attempt to repair that drive. [...] So, we won't be able to recover anything from a drive that has the actual platters inside damaged to a certain extent."

    SSDs, on the other hand, have several memory chips and they all have to be destroyed in order to ensure that no data can be recovered. Typical 2.5" SATA SSDs have a protective case that needs to be removed in order to smash every chip, but SSDs that use the M.2 form factor have their chips exposed, so are easier to destroy.

    Despite appearances, phones require more work because their storage chips are integrated into their circuit boards and are well protected inside the compact devices. Getting to them will require disassembling the device, a process that's fiddly and different from one phone model to another.

    Modern phones are built to be pretty resilient so using fire to destroy them, as some people recommend on online forums, might not be such a great idea. First, you'd have to take them apart anyway to remove their built-in batteries because burning batteries is dangerous and carries a risk of explosion. Second, it will take a very hot and powerful fire to thoroughly damage a phone's internal components.

    "We actually had a case where a phone was burnt with a body inside of a barrel and the phone was melted almost beyond recognition—you couldn't tell if it was a phone or a wallet," Little said. "It was just a shred of a phone and we were actually able to pull the chip on it and get a partial read and identify whose phone it was and get text messages and pictures off of it."

    An alternative to wiping data “is to physically destroy the device, smashing it up thoroughly so that the memory chip packages are broken into pieces," Ross Anderson told me. "Yet another alternative is to discard it in deep seawater, or bury it somewhere it won't be found."

    But smashing a phone into little pieces using a hammer might not be easy if the phone has a metal casing. If you decide to do that it’s also advisable to remove the battery first, so you’ll likely have to open up the case anyway.

    Listen to Motherboard’s new hacking podcast, CYBER, here.


    Bitten by wanderlust, driven by technology - Arvind Nithrakashyap's journey to Rubrik | killexams.com real questions and Pass4sure dumps

    This week, we feature Arvind Nithrakashyap, co-founder and CTO of Rubrik, one of the world’s fastest-growing data management companies in the world.

    Arvind Nithrakashyap has been in love with databases for a long time – two decades to be precise. Building a number of core Oracle database technologies, Arvind also co-founded the Exadata product line while at Oracle.

    And while he loves his tech, Arvind not just a boring techie. His passion for travel has had him taking off to travel the world for six months.

    For the most of his life, Arvind was pretty much like other geeks - busy building the next big technology, understanding customers and iterating products to suit their needs. What differentiates him, though, is his vision and the ability to build in a scalable and sustainable fashion.

    But this was just a lead up – to something bigger and more beautiful – to Rubrik, one of the fastest growing data management companies in the world. This, and more, in today’s column.

    Arvind-Nithrakashyap

    More Entrepreneurial instincts in the family

    Arvind’s father was born in a village in Mayiladuthurai in Tamil Nadu and moved to Hyderabad to study and later work. His mother was from Coimbatore and both his parents worked in banks. His father moved to Chennai and Arvind was born in Coimbatore in 1973. He was raised in Chennai and with both his parents at work, his grandmother was a big influence on him.

    In 1979-80, Arvind’s father started his own business. “He was a huge risk taker, to an extent bigger than I am. He first got into the supply chain of gas cylinders, then he pivoted to the envelope business, which went quite far.”

    An introvert child

    Arvind says he is an introvert and as a child was never physically very active, preferring books over the sports field. A product of Sishya School in Chennai, Arvind recalls, “It was a very different school. Unlike other schools then, the emphasis on extra-curricular activities was very high with students from diverse backgrounds. It was like a startup of schools.”

    Opting for Maths-Science was natural for Arvind, and he also took Brilliant Tutorials’ correspondence course to prepare for IIT-JEE. In his entire class of 30 students, he was the only one preparing for JEE. With an All-India 65 rank, Arvind joined IIT Madras.

    Computer Science over Electrical Engineering

    IIT-Madras was a no-brainer and Arvind opted for Computer Science over Electrical Engineering, which was then a trend. His only exposure to computers was with Atari Games or ZX Spectrum Games and a few classes in basic programming at Computer Point.

    Arvind decided to stay in the hostel, and this allowed him to interact with his college mates and forge many close friendships. “In the Computer Science department, we had eight PCs of which only three would work. We had Sun 360s workstations and not even SPARKstations.”

    Peer to peer learning > classroom learning

    At IIT Madras, Arvind says he learnt more from his peers than his professors. He learnt PASCAL, C and Assembly Language programming in college and built a compiler, a GUI programme, and worked on distributed systems.

    In his final year, his Computer Architecture professor Kalyana Krishnan was his advisor and was working on building local language support. While students from earlier batches had built a library that would take inputs based on phonetics, Arvind built an editor where one could type and save.

    Database – where it all starts

    In his final year, Arvind got a job offer from Infosys but instead, he chose to study further an went to University of Massachusetts’ Amherst College, which was pretty big on artificial intelligence.

    “During grad school I realised I wasn't exactly cut out for this - writing papers, going for conferences didn't interest me much. Two years into it, I decided to move out.” In grad school, Arvind worked in the software engineering lab understanding the synthesis between software engineering practices and databases. He worked on C, Ada and a bit of C++. Java was just beginning get popular then.

    Story Continues

    Oracle and databases

    Arvind joined Oracle as a part of the university recruiting programme. “To me, it was very interesting because Oracle was working on the heart of the database system. I started working on some core projects around building support for 8K and 16K block size data warehouses. I wrote C code at Oracle for the next decade.”

    Arvind was by far the junior-most engineer and his team was responsible for building a database cache. “Oracle allocates memory in database cache and when you query to read a block, you would actually pull the block, store it in the cache, pin it and try to keep the block as long as it remains hot. The algorithm would then track references to it every time there was a hit on the cache. I worked on optimising how we efficiently you write the data out, and manage LRU cache.”

    One of his biggest learnings was that the things we take for granted – such as performance, and scale - are the toughest to build and achieve.

    By 1998-1999, there were many things going on in Arvind’s head - whether to quit and start up or continue or get a green card.

    His father then advised him to finish his work at hand at Oracle, go someplace else and start up after a year or so.

    Looking back, Arvind says this advice saved him from being part of the dot-com bubble. Around the same time, a cousins convinced him to sell some of his Oracle stock, which crashed as well.

    Green card – green signal to build more @Oracle

    In 2000-01, huge multi-processor systems like 72 (core) CPUs by Sun, 64 (core) CPUs by HP were introduced. The team at Oracle saw that it was faster to run Oracle databases on 48 core CPUs than on 64 core CPUs (HP Superdome). This was because the database wasn't able to scale. The problem was in the recovery layer of the system.

    “Database log was becoming the bottleneck, but nobody really thought about it in first place because recovery isn't really in picture. We rewrote the core recovery layer for Oracle and ended up multi-threading that part. It was a huge learning process for me - Go with your gut. People may say it doesn't make sense but you've to push through.”

    Co-founding Exadata

    Oracle had earlier worked with storage windows to get API access to better understand storage layers. The company thought it should own a storage layer and so Arvind and two colleagues decided to build the storage system. When he started, Arvind realised hardware procurement would take eight months. So, he simply went to the local store and bought PCs. The trio built Exadata for Oracle, which is now one of its core storage platforms. They used C++ to build Exadata.

    It took us three years to launch the product version 1.0. By that time, a startup would have shipped maybe version 6 or 7.0. I decided that it was time to move on. I didn't want to continue to stay in Oracle just to figure out what I want to do later.

    He quit and decided to travel with his wife.

    The startup world

    Looking to work in a startup, Arvind joined Purisma, a startup in the customer management space. He took over the fuzzy match engine part, which worked on top of the Oracle database. Arvind worked on tuning database to extract more performance. This was the first time that Arvind had looked at database from the outside. Also, this was the first time that Arvind was working on the Java language.

    Arvind worked with an external vendor to package the product and the idea was to make it very simple for a business user to install it. This was his first exposure to the sales side.

    “I learnt that if you're open and honest with the customer, and you know what you're talking about, you can question their ideas and assumptions as well to make the project implementation successful.”

     The non-tech acquisition and the wanderlust

    Purisma was acquired by Dun & Bradstreet and Arvind decided leave a year later. He wanted to travel, and saw this as an opportunity.

    “We (Arvind and his wife) went to South America, starting from Argentina, spent two weeks learning Spanish, went to Bolivia, Machu Picchu trek, came back to Brazil, spent one month there. We then flew back to SFO for a couple of days and from there to London and then to Uzbekistan. Then we took the Silk Road. However, we couldn't go to Kyrgyztan due to visa issues. We went to Xinjiang, Kashgar, Beijing, Xian in China and spent two months there.”

     I was jobless, homeless and probably in the happiest time of my life. When you travel, you see people of all age groups and different backgrounds. You see them falling in love with cultures and languages. I realised wherever we go in the world, there's Coca Cola and there's internet!

    Building Rocket Fuel

    Back from his travels and Arvind met Bipul Sinha, the founder and CEO of Rubrik. The two had earlier worked together at Oracle. Bipul was an investor, and had invested in Nutanix. Arvind met Abhinav Gupta, founder of Rocket Fuel Inc, and decided to join the company.

    It was interesting times as display ads were becoming big then. I built a real time infrastructure to be able to take requests in real time to show the right ads. When I left, we were handling 50 billion requests a day, and each request had to be handled within 50-60 milliseconds.

    Arvind was the first engineer at Rocket Fuel and built a team of 30 engineers. He built the first implementation server based on the Google spec. The tech stack was MySQL database, and they had the Hadoop cluster where data pipeline and machine learning models would run. Every request went through the Hadoop cluster. Arvind and his team built an in-memory cache which would refresh at a fixed frequency. “Each of our servers acted independently. We built budgeting framework as well. We had data centres in Asia, Europe and the US.”

    Going public and moving on

    Rocket Fuel went public in 2013, and Arvind was present for its opening on NASDAQ. By then, Bipul and Arvind had started talking about Rubrik. Bipul bounced a few ideas off of Arvind, and the duo started brain storming.

    “Both of us believed there's something in this space. We got to know that almost a third of all backup customers would change their technology in the next three years, which means there was massive pain in the current systems.”

    TSM, Veritas, Networker, and others were common back up options then. Arvind and Bipul saw demos of existing players and spoke to some experts, including John Thompson (Chairman, Microsoft). Everyone told them it was a tough space, but to Arvind and Bipul, this felt like the right solution.

    The fantastic four starting Rubrik

    Arvind believes they got very lucky with Rubrik and they haven't had to pivot. “The product we set out to build is the product we have today. The core thesis is same. You've a software that scales out, you put a policy framework in front, and then the system takes care of it (from infrastructure perspective).”

    Rubrik – founded by Bipul Sinha, Arvind Jain, Arvind Nithrakashyap and Soham Mazumdar - raised $10 million from LightSpeed Ventures as the latter saw value in it. Arvind Jain was with Google and Soham had just sold his startup to Facebook. The three of them started coding right away, while Bipul played the role of product manager and recruiter.

    Building blocks of Rubrik

    The team set a milestone that in three months, they would have a proof of concept where they would be able to take a virtual machine, back it up on to a file system and then mount it back as virtual machine.

    “We first built the meta data layer, I focused on that. Arvind (Jain) focused on file systems, Soham was initially looking at how to build the piece which allows to recover (data) instantly, along with data ingestion from VMWare.”

    The team hired its first engineer in five to six weeks, and in two months there were eight engineers to work on job scheduler, core data lifecycle management, and many other layers. In 11 months, Rubrik already had its product deployed by a customer. They started the early access programme in 2015.

    Rubrik was initially focused on VMWare and for almost two years, it was just supporting applications on VMWare. They started supporting physical SQL servers and Windows servers later and built a generic layer for data management.

    Tech stack – keeping it simple

    Rubrik has been building distributed systems which could scale as needed. In the process, it built a lot of components and have to be careful how they design it. The focus is on simplicity, which solves a lot of problems.

    “We have distributed task scheduler and a distributed cluster management system to detect error and auto heal. On top, we've a core policy engine which is data management layer (managed data lifecycle).”

    There is a separate component building search index for everything, like search-based file recovery, and on top of it is the API layer. UI also interacts with this API. The team made this decision early on and it proved to be a big differentiator.

    Current challenges (and opportunities)

    According to Arvind, Rubrik is at exciting stage with some interesting set of challenges (and opportunities):

  • Backup is a mature market so they have to support a spectrum of applications. To be able to do that in an accelerated fashion is a challenge.
  • There’s an opportunity to go beyond backup and recovery. It's a bit of product challenge at the moment and how they will build tech stack around it. They also have to continue feeding the backup while building new products.
  • There is petabytes of data coming in, and to manage it efficiently and let others use it (to build applications on top of it) while making it scalable is a challenge.
  •  Decision making and values

    Arvind says he doesn't make spontaneous decisions. “It has to be data driven. I take advice and feedback from others as well. I don't think you can make decisions in isolation.”

    He believes the following line defines him well - “If I'm not good at what I'm doing, then I've no business being there.”

    For now, he sees himself continuing to build Rubrik and taking it to its maximum potential. Apart from travel, he’s motivated to do something that has impact.

    Technology to me is a tool that can have a huge impact on lives. What appeals to me is solving interesting problems and providing value as well.

    You can connect with him on LinkedIn or follow him on Twitter.

    Trivia about Arvind

  • Arvind and his wife met through Match.com. In fact, they were among the early adopters of the platform.
  • Few years after acquiring Purisma, Dun & Bradstreet sold it to SAP.

  • Security patch issued for Arcserve Unified Data Protection | killexams.com real questions and Pass4sure dumps

    Arcserve Unified Data Protection customers are being told to patch the backup platform after a security provider found issues that could leave data unprotected.

    The four vulnerabilities in Arcserve UDP could compromise sensitive data through access to credentials, phishing attacks and the ability for a hacker to read files without authentication from the hosting system, according to Digital Defense, the company that discovered the problems.

    Digital Defense, based in San Antonio, reached out to Arcserve with technical details of the vulnerabilities, said Mike Cotton, senior vice president of engineering at the security provider, which disclosed its findings publicly last week.

    “[We] walked them through scenarios with how attackers can exploit the vulnerabilities in question,” Cotton wrote in an email. “Their team was extremely professional and they were very proactive in wanting to understand where the vulnerabilities were and how precisely to fix them.”

    The vulnerabilities affect Arcserve Unified Data Protection 6.5, updates 3 and 4. Update 4 launched last month. UDP, Arcserve’s flagship product, features backup, recovery, automated testing, granular reporting and hardware snapshot support.

    Arcserve Unified Data Protection customers can download a patch from Arcserve Support and reach out to the company to address any outstanding questions or concerns, the vendor said. Arcserve, based in Eden Prairie, Minn., also provided manual fix application instructions.

    “Arcserve is committed to developing data protection solutions that meet the highest security standards to protect our partners, customers and, most importantly, their data,” the data protection vendor said in a statement. “We welcome reports from security researchers and experts so we can quickly and efficiently address any vulnerabilities, which was done by our incident response team in this case.”

    Cotton said installing Arcserve’s patch is the best way to address these particular flaws.

    “More generally, undertaking controlled network access strategies to limit access to the administrative interfaces of key backup systems can further harden installations such as this,” Cotton wrote.

    Digital Defense regularly works with vendors regarding the disclosure of zero-day vulnerabilities. When the company’s Vulnerability Research Team finds issues and validates them, it contacts the affected vendor and helps with remediation actions.

    Digital Defense has found vulnerabilities in other major backup products, including Dell EMC’s Avamar in 2017, but Cotton said this is the first time the company has worked with Arcserve.

    “We believe they’ve addressed the flaws in question for these vulnerabilities,” Cotton wrote, “so no further action is necessary for them.”



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    EMC E20-895 Exam (Backup Recovery - Avamar Expert for Implementation Engineers) Detailed Information



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