ReclaiMe Data Recovery Training

RAID Recovery Course - Parity Analysis Test

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

full 4-disk Promise RAID6 or full 4-disk RAID5
4-disk RAID 5 with one disk missing
3-disk RAID 5 with a hotspare

Choose the correct statement

A XOR 0 = 0
A XOR 0 = A
A XOR 0 = 1

Choose the property of XOR function due to which "mirrors are always even"

A XOR A = 0
A XOR 0 = A
A XOR B = B XOR A

Choose the property of XOR function due to which "blank disks litter the parity analysis"

A XOR 0 = A
A XOR B = B XOR A
A XOR A = 0

Choose the property of XOR function due to which "you do not need to know the parity location when reconstructing a missing disk"

A XOR A = 0
A XOR 0 = A
A XOR B = B XOR A

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

RAID 5 with a blank disk
Full RAID6
RAID6 with a missing disk
Full RAID 6 with a hotspare

Choose the correct statement

A XOR A = 0
A XOR A > 0
A XOR A < 0

Which parity function is usually used in a RAID5?

Lempel, Ziv, Welch
Huffman
XOR
Reed-Solomon

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

RAID 6 with a missing disk
Full RAID6
RAID 5 with a missing disk
Full RAID 5 with a hotspare

Check for what parity tests are done

each disk separately
full disk set
all disk combinations with one disk excluded

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