Data Recovery

4 Key excerpts on "Data Recovery"

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  eBook - ePub

  Nanocrystals in Nonvolatile Memory

  • Writam Banerjee(Author)
  • 2018(Publication Date)
  • Jenny Stanford Publishing

    (Publisher)

  Information is an asset and just like any other important assets, is essential to an individual’s or organization’s operation and consequently needs to be appropriately stored and available when needed. This is particularly vital in the increasingly interconnected computing environment. Due to this increasing interconnectivity, information is now even more exposed to a growing number and a wider variety of threats and vulnerabilities than before. These threats often lead to loss or distortion of information, apart from other issues, like invasion of privacy and denial of service. Because data is an irreplaceable strategic asset, loss or destruction of data can result in dreadful social, technical, financial, environmental, social, and political consequences for an individual or organization. In today’s world of tight competition, entities cannot afford to lose critical data and information because such loss can be too costly to any desired smooth progression.

  Entities globally use various ways to recover important information that was lost. One way is to use some Data Recovery software to attempt to retrieve the lost data and later use some data repair software to repair corrupted data. Another possible way is to use external Data Recovery services. The third way is to restore data from a data backup. Data Recovery software alone is often fronted as not being enough to restore lost or corrupt data because it does not fully guarantee that the lost data will be totally recovered. It may also end up being a long and very tedious process attempting to restore data using recovery software.

  7.4.3 Data Extraction/Acquisition

  It is critical to draw a distinction between Data Recovery and data extraction. Although Data Recovery might include data extraction, the two concepts are fundamentally different. The focus of the authors in this chapter is primarily on Data Recovery. Data extraction is drawing out something from any substance. In this case we extract data from a flash chip or device. This may not necessarily imply that the device has failed but may mean the board on which it is attached or even its connector has failed. There are several possible data extraction/ acquisition approaches for obtaining a full copy of flash memory data. The key approaches to be discussed are data extraction tools and physical extraction.

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  eBook - PDF

  The Best Damn Cybercrime and Digital Forensics Book Period

  • Anthony Reyes, Jack Wiles(Authors)
  • 2011(Publication Date)
  • Syngress

    (Publisher)

  Although the two terms are often used interchangeably, there is a difference. Data Recovery is a process of salvaging data that was lost or deleted. Computer forensics is a process of gather-ing and examining evidence to establish facts so that accurate testimony and evidence can later be presented in court or other hearings. In considering these definitions, you will notice that there is a difference in why the data is being acquired: Data Recovery seeks to restore the data, whereas computer forensics seeks to obtain data to be used as evidence in court. Mistakes happen, and its common for a person to accidentally delete a file needed for work or personal use. Ask any network administrator, and they’ll tell you that there are many occasions when they need to restore a file that a user has deleted. On personal computers, Acquiring Data, Duplicating Data, and Recovering Deleted Files • Chapter 10 349 www.syngress.com workstations, and laptops, you can restore the data from the Recycle Bin or Trash Can. If the file has been deleted from removable media or has been emptied from the Recycle Bin, then Data Recovery software can be used to retrieve the data. Such software is not suitable in other situations. Standard Data Recovery software may not guarantee that the file won’t be modified when it is recovered, or the software may generate temporary files that could damage other data on the disk. To preserve data, computer forensic software is necessary. If you are investigating an incident, always assume that the case will eventually go to court. If you used software that was not designed for forensic use, you could alter or damage data on the disk and compromise the investigation. In addition, any data that you retrieved could be deemed inadmissible in court.

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  eBook - ePub

  Data Protection

  Ensuring Data Availability

  • Preston de Guise(Author)
  • 2020(Publication Date)
  • Auerbach Publications

    (Publisher)

  service restoration . Data Recovery merely refers to retrieving data from protection storage, but depending on the nature of the failure, storage, and data, there may be considerably more effort involved in achieving service restoration. At its simplest, this might be as rudimentary as starting application services once a recovery process has been completed, but for more complex workloads, this might involve any or all of the following examples:

  • Executing recoveries across multiple systems
  • Coordinating service starts or restarts across application and database servers
  • Adjusting IP addresses and redirecting DNS
  • Notifying users or consumers the service is available again

  In Chapter 4 , we described the elements of a data protection system, with technology only being one element alongside five others (people, training, testing, service level agreements, processes, and documentation). Similarly, we see other components involved in service restoration beyond just transferring data from one source into another or redirecting where we access data from.

  Understanding the service restoration activities and times they will take is critical to correctly determining the real service level objectives that can be offered to the business. For instance, merely estimating that a database can be recovered in 8 hours because the backups can be read from protection storage in 8 hours pays no consideration to any consistency activities that may have to be applied post-restore,* what services might need to be reset, or what nontechnical post-recovery processes might need to be performed before the business deems the service to be “restored.”

  * Consider again for instance that in databases, the nomenclature restore versus recove ry is used. Restore typically refers to pulling data back from protection storage/backup, but reco

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  eBook - ePub

  Operating System Forensics

  • Ric Messier(Author)
  • 2015(Publication Date)
  • Syngress

    (Publisher)

  Chapter 3

  Data and File Recovery

  Abstract

  Investigation of the different types of data that may be stored in the file system, including locating files is strictly based on the header and footer values. Other locations for storing data both within and outside of the file system are covered.

  Keywords

  operating systems forensics operating environments

  INFORMATION INCLUDED IN THIS CHAPTER:

  • Data carving

  • Slack space

  • Searching for data

  • Data hiding

  Introduction

  Once you understand the layout of the file systems you are working on, you can better understand how to go about retrieving information from the disk. There are a number of reasons you may need to go digging. One of the reasons is because someone may have deleted a file and it may not clearly show up in the primary file tables but the data may still live on the drive. There may also be file contents in the slack space after the end of a file. There may be file contents sitting in a sparse file on the file system and grabbing the contents of the file out of the clusters or blocks directly may be easier than trying to read through the sparse file trying to figure out how the contents of that file are organized. Data Recovery is founded on understanding where to find the important data structures within a file system. Of course, you also need to know what data you are looking for.

  There are a number of places where data or evidence could be hiding, depending on the file system. There are so many different ways to stuff data into a hard drive and so many places where data can continue to hide out. The user may have even lost track of that data. In some cases, you cannot rely on the contents of the directory because it is trivial to put data in places where you may not expect it to be, including simply changing the name. I can rename a JPEG file and make it slightly harder to locate, depending on how you are going about searching for it. Fortunately, there are easy ways to resolve this.

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