Data Recovery and Techniques

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Data Recovery and Techniques
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Data Recovery

• Data recovery is a process of salvaging
  inaccessible data from damaged or corrupted
  secondary storage , when the data store cannot be
  accessed in a normal way.
• The data is most often salvaged from storage
  media such as internal or external hard disk
  drives (HDDs), USB flash drives , solid-state
  drives (SSDs), magnetic tapes, CDs, DVDs, and
  other electronic devices.

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Physical Damage

• A variety of failures can cause the physical
  damage to the storage media. The failures may be
  the result from human error or natural disasters.
• For example hard disk may suffer mechanical
  failures such as head crashes.
• Physical damage always cause atleast some data
  loss.

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Recovery Techniques

• Recovery process involves multiple techniques
• Some damage can be repaired by replacing part in
  the hard disk but logical damage may occur.
• A specialized disk-imaging procedure is used to
  recover every readable bit from the surface.

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Logical Damage

• In logical damage situation, error is not a
  problem in hardware but It requires software
  level solutions.
• The logical errors are Corrupt partitions and
  file systems, media errors and overwritten data.

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Remote Data Recovery

• Data recovery experts always do not need to have
  physical access to the damaged hardware. They can
  use the software techniques to recover data.
• They can perform the recovery using remote
  access software over the internet.

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Phases of data recovery

• There are four phases in data recovery
• Phase 1 Repair the hard disk drive
• Phase 2 Image the drive to a new drive or a
  disk image file
• Phase 3 Logical recovery of files, partition,
  MBR and MFT
• Phase 4 Repair damaged files that were
  retrieved

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Thank You

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