ReclaiMe Data Recovery Training

RAID Recovery Course - Overall Test

Look at the picture on the right and guess the possible RAID level

RAID 5 with a missing disk
Full RAID5
Full RAID 5 with a hotspare
RAID10

Check what you can do with entropy analysis

spot the disks which do not belong to the RAID in question
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

When to apply parity analysis?

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

Where is RAID metadata stored?

at the end of the member disk
at the beginning of the member disk
anywhere, depending on the implementation specifics

What is the first step in RAID recovery?

RAID configuration recovery
collecting all the information available about the case
entropy analysis
mirror analysis

When to apply entropy analysis?

after content analysis
between zero and mirror analysis
before content analysis

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

Is it possible to recover data if one of the member disks in a RAID5 failed?

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

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

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

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