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Data Recovery Procedures

Removable media

Data-loss circumstances

Recovery from tangible and reasonable impairment due to mechanical malfunction, software corruption or human miscalculation, such as:

  • Unobtainable media
  • Ruined data
  • Bugs or virus attack
  • Combustion & water impairment
  • Media surface corruption and destruction
  • Inadvertent reformatting
  • Inadvertent erasure of data

Recovery procedure for removable media

Preliminary analysis ascertains whether the media is compatible with our lab equipment. If so, the main concern is to design a crude representation of the information on Data Detect media so that a reasonable examination can decide the state of the information loss. If the data is hard to find our lab will analyze the workings and carefully examine the condition of the media to ascertain the degree of impairment.

Recovery of hard disks often means replacing failed or spoiled workings in a dirt free location by means of dedicated hardware and software utensils to produce the crude representation. Unsuccessful workings usually comprise electronics, read/write heads, head assemblies, magnets & drive motors.

Reasonable retrieval uses the crude representation by investigating the low-level information zones and deciding what repairs to file system structures are required to gain entry to the significant information. Every now and then the presented file system structures are absent or harmed to such a large extent that information has to be removed straight from one or more sections of the crude representation.

Data Detect has devised a range of software tools which our technicians use to examine, repair & retrieve information from crude representations of all operating systems. Once recovery is successful, a file inventory is formed and data validity is verified.

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Desktop/Laptop

Data-loss circumstances

Recovery from physical and logical damage due to mechanical and electrical failure, software corruption or human error, such as:

  • CPU won't boot
  • Notebook dropped or bumped - no longer turns on
  • Difficult to get to drives and partitions
  • Applications that are unable to run or load data
  • Corrupted data
  • Bugs or virus attack
  • Hard disk parts failure
  • Hard disk crashes
  • Accidental deletion of data
  • Combustion & water department
  • Media surface corruption and destruction
  • Inadvertent reformatting
  • Inadvertent erasure of information

Recovery procedure for hard disk drives

Each situation has its own unique features. Based on Data Detect's broad experience, we can categorize most single hard drive recoveries into two broad categories: External and Internal.

External cases

  1. Logical (Drive is Functioning):
    • Deleted files
    • File-system structures corrupted.
  2. Physical:
    • External electronic issues (example: replacing a bad PCB).
    • Read errors.

These problems can be addressed without opening the HDA (Head Disk Assembly) of the drive.

External cases can exceed this range if there is extreme corruption of the file-system or if the drive comes from a UNIX or APPLE MACINTOSH system.

Internal cases

  • Head crash
  • Electro mechanical
  • Contamination

These problems can only be addressed by opening the HDA (Head Disk Assembly) of the drive under clean room conditions.

Internal cases exceeding this range include, for example, a 200GB SCSI drive requiring a high cost of parts. Drives from UNIX or APPLE MACINTOSH systems may also exceed this range.

The actual price of any case is determined by two main factors:

  1. The cost of components.
  2. The overall lab time spent on the case and what proportion of the work is done by subordinate, intermediate or higher-ranking technicians. In turn, the amount of lab time and seniority of staff needed are affected by:
    1. The File-system category. (Different Windows systems such as FAT32 and NTFS, APPLE MAC or UNIX)
    2. The extent of file-system rebuilding needed. This is the sum of reasonable restoration work needed for an external recovery or as the follow-up steps for an internal recovery.

Other factors affecting the price quote are:

Other factors affecting the price are the chronological lab achievement ratio on certain types of data loss on particular models. Note. If data is unrecoverable the costs incurred in attempting the recovery are borne wholly by Data Detect and you will not be charged. Where we take pleasure in a superior likelihood of achievement (and thus less threat) the price quote may be less than those cases with a lower likelihood of achievement and more risk.

Considerable research and development is needed to keep up with the scientific developments in the disk drive business. Consequently, data loss problems on new technology are priced higher than for more conventional models.

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Palm/Pocket PC & IPOD

Data-loss circumstances

Recovery from physical and logical damage due to mechanical and electrical failure, software corruption or human error such as:

  • Inaccessible media
  • Corrupted data
  • Fire and or water damage
  • Media surface contamination and damage
  • Accidental reformatting
  • Accidental deletion of data

Recovery procedure for Palm/Pocket PC's & IPOD's

While striving to maintain our technological edge in the data recovery industry we began an extensive research program into the development of tools to perform IPOD data recovery. We understand Apple's IPOD architecture and how it reads and writes data on the HPFS+ file system. Most pocket PC's have a similar system configuration.

Our preliminary analysis ascertains whether the media is friendly to our software and equipment. If so, the main concern is to design a crude representation of the information on a Data Detect server so that reasonable examination can decide the state of the information loss. If the data is hard to find we will analyze the workings and carefully examine its condition to ascertain the degree of impairment.

Recovery of crashed hard disks in the Palm Pc or IPOD often involves replacing failed or damaged components in a clean environment and using specialized hardware and software tools to create the raw image. Failed components typically include: electronics, read/write heads, head assemblies, magnets and drive motors.

Logical recovery uses the raw image by examining the low-level data sectors and determining what fixes to file system structures are needed to get access to the important data. Sometimes the existing file system structures are missing or damaged so much that data has to be extracted directly from one or more fragments of the raw image.

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Mean time to repair

  • Removable Media: Comprehensive recovery turn-around time including examination and recovery is usually between 1 and 5 days. Some critical cases can take a great deal longer.
  • Desktop/Laptop: Comprehensive recovery restore time including examination and recovery is usually between 1 and 5 days. Some critical cases can take a great deal longer.
  • RAID: Mean time to repair time including examination and recovery on RAID is usually between 7 and 14 days. Some critical cases can take a great deal longer.
  • Palm/Pocket PC/IPOD: Complete recovery turn-around time including analysis and recovery is usually between 5 and 7 days.

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