ReclaiMe Data Recovery Training

RAID Recovery Course - Content Analysis Test

Check for what parity tests are done

all combinations with one disk excluded
full disk set
each member disk
all disk pairs

What does parity analysis calculate?

percent of parity matches in each disk
percent of parity matches in disk set
percent of parity matches in each disk pair

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

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

If in parity analysis you see 0% parity for full disk set and 100% parity with one disk excluded, what the array level is?

full regular RAID5
RAID5 with a hotspare disk
certain type of RAID6
RAID5 with a missing disk

Check the possible RAID levels if parity analysis gives you 0% parity both for full disk set and exclusion combinations

If you see several mirror pairs in mirror map, it points to

RAID1
Ex-hotspare disk
RAID5
RAID10

Can data recovery software detect RAID level automatically?

no
yes
yes, in case of RAID5

Look at the picture on the right and guess RAID level

4-disk RAID 5 with one disk missing
RAID0
3-disk RAID 5 with a hotspare
full 4-disk RAID 5

Ratio of zeros analysis is applied to

set of RAID disks
single disk

If you see one mirror pair in mirror map, it points to

RAID5
RAID1
Ex-hotspare disk
RAID10

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