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RAID Recovery Course - Entropy Analysis Test
Look at the picture on the right and choose the appropriate description
selected block size is less than the actual block size
selected number of disks is wrong
selected block size is larger than the actual block size
Choose to what you should apply the entropy analysis
each disk separately
full disk set
Look at the picture on the right and choose the most complete configuration
full 4-disk RAID6, 128 KB block size
full 4-disk RAID6, 256 KB block size
full 4-disk RAID5, 256 KB block size
full 4-disk RAID5, 128 KB block size
Look at the picture on the right and choose the most complete configuration description
full 3-disk RAID5, 16 KB block size, topmost disk doesn't belong to the RAID
4-disk RAID5 with one disk missing, 16 KB block size
full 4-disk RAID5, 32 KB block size
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
Check what you can get with entropy analysis
original number of disks
block size
spot synchronous RAIDs
spot asynchronous RAIDs
disk order ideas
Check RAID types to which entropy analysis is applied
RAID5
RAID6
JBOD
RAID10
RAID0
RAID1
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 analysis gives you a visual representation of parity blocks?
parity analysis
entropy analysis
ratio of zeros analysis
What has the higher entropy?
parity block in a RAID
data block in a RAID
Next lesson - Parity Analysis
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