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RAID Recovery Course - Entropy Analysis Test
When to apply entropy analysis?
between zero and mirror analysis
before content analysis
after content analysis
Check the criteria of a correct picture in entropy analysis
peaks do not overlap
has several peaks
there is one overlap in peaks
has one peak per disk
Look at the picture on the right and choose the appropriate description
selected block size is larger than the actual block size
selected number of disks is wrong
selected block size is less than the actual block size
How to do entropy analysis
launch the analysis and wait until ReclaiMe Pro gives you the correct RAID configuration
change settings to make pictures match expectations
What has the higher entropy?
data block in a RAID
parity block in a RAID
Check what you can get with entropy analysis
original number of disks
spot asynchronous RAIDs
disk order ideas
spot synchronous RAIDs
block size
Entropy is a measure of data randomness
true
false
Check the parameters you should vary in entropy analysis
disk order
block size
RAID level
number of disks
Look at the picture on the right and choose the most complete configuration
full 4-disk RAID5, 256 KB block size
full 4-disk RAID5, 128 KB block size
full 4-disk RAID6, 128 KB block size
full 4-disk RAID6, 256 KB block size
What analysis gives you a visual representation of parity blocks?
ratio of zeros analysis
entropy analysis
parity analysis
Next lesson - Parity Analysis
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