ReclaiMe Data Recovery Training

RAID Recovery Course - Content Analysis Test

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

Check for what parity tests are done

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

Parity test for a full regular RAID5 gives

0% parity in full disk set and 100% parity in all combinations with one disk excluded
0% parity in full disk set and 0% parity in all combinations with one disk excluded
100% parity in full disk set and 0% parity in all combinations with one disk excluded

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

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

What does parity analysis calculate?

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

Look at the picture on the right and guess RAID level

RAID0
RAID5
RAID10
RAID1

Look at the picture and choose the possible variant

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

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

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

RAID10
RAID0
full RAID5
RAID 5 with a missing disk

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

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

Next lesson - Parity Analysis

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