ReclaiMe Data Recovery Training

RAID Recovery Course - Content Analysis Test

What does parity analysis calculate?

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

Check for what parity tests are done

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

Parity test for a full regular RAID5 gives

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
0% parity in full disk set and 100% 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
RAID5 with a missing disk
full regular RAID5
certain type of RAID6

If you see one partial mirror pair (60-80%) in mirror map, it points to

RAID5
RAID10
Ex-hotspare disk
RAID1

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

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

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

Is it needed to know RAID level to recover data?

yes
no
only if you need a full scale RAID recovery (RAID metadata is severely damaged)

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

full RAID5
RAID10
RAID 5 with a missing disk
RAID0

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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