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Data recovery statistics
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This chart illustrates the "simple volume recovery" run speed (gigabytes
per minute of the area scanned).
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The run time is measured from start of the raw data
identification to the point when a file and folder tree is
displayed. The validation and/or file copy process are not included.
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The area size to analyze is recorded as provided by
user which can be a bit off the actual volume size. This effect is
believed not to provide any significant discrepancy.
The slower speeds of the FAT recovery are attributed to the fact that
FAT is mostly used on older generations (slower) hard drives and on a
slower solid-state devices (e.g. USB flash drives). |
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This is without a doubt the most interesting part of the data. Subject
to the limitations described at the beginning of the article (i.e. no
physical failures),
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If a data loss involves a FAT volume, there
is an about 50% chance to recover nearly all the data (at least
90% of files). In about 75-80% cases at least 75% of the
files can be recovered.
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If there is an NTFS volume involved, averages
are a bit worse: 40% chance for a successful recovery (at
least 90% of files) and about 75% chance to recover at least 70%
of the files.
Note
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- This document is based on the dataset as available on 17th
August 2006
- The recovery performed by Zero Assumption Recovery versions 7.8,
7.9 and 8.0.
- RAID reconstruction stats are excluded from the dataset.
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Corrupt disks are like babies; they need ZAR to nurse them.
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