ReclaiMe Data Recovery Training

RAID Recovery Course - Content Analysis Test

What does parity analysis calculate?

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

Check for what parity tests are done

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

Choose the RAID to which the ratio of zeros analysis can't be applied to

RAID created over brand-new disks
RAID created over second hand non-blank drives
Mirror

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

Ex-hotspare disk
RAID5
RAID10
RAID1

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

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

RAID1
RAID10
Ex-hotspare disk
RAID5

Look at the picture and choose the possible variant

Disks {4,5,6} belong to one RAID; Disk 7 is a hotspare
Disks {4,5,7} belong to one RAID; Disk 6 is a hotspare
Disks {5,6,7} belong to one RAID; Disk 4 is a hotspare

Look at the picture on the right and guess RAID level

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

Look at the picture on the right and check the possible RAID level(s)

RAID0
RAID 5 with a missing disk
RAID10
full RAID5

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

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

Next lesson - Parity Analysis

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