RAID Recovery Course - Overall Test
When you should do parity analysis?
when content analysis is done but RAID level is still unknown
after entropy analysis
Is it possible to recover data form a RAID0 in which one of the member disks failed?
yes, all the data can be recovered
yes, but only half of the data can be recovered
no, for all practical purposes it is impossible since all you get are files no larger than block size
What is the correct order of the content analysis stages in ReclaiMe Pro?
parity analysis, ratio of zeros, mirror analysis
ratio of zeros, mirror analysis, parity analysis
mirror analysis, ratio of zeros, parity analysis
Look at the picture on the right and guess the possible RAID level
RAID 5 with a missing disk
Full RAID 5 with a hotspare
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
Check what ratio of zeros helps exclude
Where is RAID metadata stored?
at the beginning of the member disk
anywhere, depending on the implementation specifics
at the end of the member disk
What information about RAID you can get just by looking at the disks in Disk Management?
idea about RAID level
idea about first disk
Check what you can do with entropy analysis
detect the first disk in the RAID
notice that start offset doesn't equal zero
spot the disks which do not belong to the RAID in question
spot the disks which do not form a parity-based array
Look at the picture on the right and choose the most complete configuration
full 4-disk RAID5, 16 KB block size
full 4-disk RAID5, 32 KB block size
4-disk RAID5 with one disk missing, 32 KB block size
full 4-disk RAID5, 64 KB block size
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