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RAID Recovery Course - Entropy Analysis Test
What has the higher entropy?
data block in a RAID
parity block in a RAID
Entropy is a measure of data randomness
false
true
Check what you can get with entropy analysis
original number of disks
spot synchronous RAIDs
disk order ideas
spot asynchronous RAIDs
block size
Choose that which has the lowest entropy
text
parity in a RAID
video
How to do entropy analysis
change settings to make pictures match expectations
launch the analysis and wait until ReclaiMe Pro gives you the correct RAID configuration
Choose to what you should apply the entropy analysis
full disk set
each disk separately
Check RAID types to which entropy analysis is applied
JBOD
RAID5
RAID10
RAID0
RAID6
RAID1
Check the parameters you should vary in entropy analysis
number of disks
disk order
block size
RAID level
Choose the correct statement
random data has high entropy
ordered data has high entropy
Look at the picture on the right and choose the most complete configuration description
full 4-disk RAID5, 64 KB block size
full 4-disk RAID5, 16 KB block size
full 4-disk RAID5, 32 KB block size
4-disk RAID5 with one disk missing, 16 KB block size
Next lesson - Parity Analysis
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