RAID Recovery Course - Parity Analysis Test

Choose the correct statement

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

Choose the correct statement

A XOR B > B XOR A
A XOR B = B XOR A
A XOR B < B XOR A

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

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

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

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

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

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

Given that P is a parity block calculated over A and B data blocks

A XOR B XOR P = 0
A XOR B XOR P = 1

A row of [A,B,P] blocks is even if

A XOR B XOR P = 0
A XOR B XOR P = 1

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

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

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

Full RAID5
RAID 5 with a missing disk
RAID 5 with a blank disk

Which parity function is usually used in a RAID5?

Reed-Solomon
Lempel, Ziv, Welch
Huffman
XOR