ReclaiMe Data Recovery Training

RAID Recovery Course - Overall Test

What does content analysis help determine?

RAID level
disk order
block size

What is the correct order of the content analysis stages in ReclaiMe Pro?

mirror analysis, ratio of zeros, parity analysis
parity analysis, ratio of zeros, mirror analysis
ratio of zeros, mirror analysis, parity analysis

If data recovered from a RAID is incorrect it means that

RAID configuration recovery failed
filesystem recovery failed
both filesystem or RAID recovery might fail, investigation is needed

Is it possible to recover data form a RAID0 in which one of the member disks failed?

no, for all practical purposes it is impossible since all you get are files no larger than block size
yes, but only half of the data can be recovered
yes, all the data can be recovered

Is it possible to recover data if one of the member disks in a RAID10 failed?

yes, but only part of the data is recoverable
no
yes, all data is recoverable
depends on which disk failed

What is the recommended approach to check the quality of RAID recovery

folder tree check is enough
check many small files, smaller or equal to block size
check large files, larger than several block sizes

Check what you can do with entropy analysis

notice that start offset doesn't equal zero
detect the first disk in the RAID
spot the disks which do not form a parity-based array
spot the disks which do not belong to the RAID in question

When to apply parity analysis?

before zero and mirror analysis
after entropy analysis
after zero and mirror analysis
between zero and mirror analysis

Look at the picture on the right and choose the most complete configuration

full 4-disk RAID5, 16 KB block size
4-disk RAID5 with one disk missing, 32 KB block size
full 4-disk RAID5, 64 KB block size
full 4-disk RAID5, 32 KB block size

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