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RAID Recovery Course - Parity Analysis Test
When to apply parity analysis?
after entropy analysis
before zero and mirror analysis
between zero and mirror analysis
after zero and mirror analysis
Parity test for a Promise RAID6 gives:
0% 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
100% parity in full disk set and 0% parity in all combinations with one disk excluded
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
Given that P is a parity block calculated over A and B data blocks
A XOR B XOR P = 1
A XOR B XOR P = 0
Check for what parity tests are done
each disk separately
all disk combinations with one disk excluded
full disk set
Choose the correct statement
A XOR B < B XOR A
A XOR B > B XOR A
A XOR B = B XOR A
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
Look at the picture on the right and guess the possible RAID level
Full RAID 5 with a hotspare
RAID 6 with a missing disk
Full RAID6
RAID 5 with a missing disk
Choose the correct statement
A XOR 0 = A
A XOR 0 = 1
A XOR 0 = 0
Choose the correct statement
A XOR A < 0
A XOR A > 0
A XOR A = 0
Next lesson - Entropy analysis
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