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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
Choose the correct statement
ordered data has high entropy
random data has high entropy
Check the parameters you should vary in entropy analysis
disk order
RAID level
number of disks
block size
Look at the picture on the right and choose the most complete configuration
full 4-disk RAID5, 128 KB block size
full 4-disk RAID6, 128 KB block size
full 4-disk RAID6, 256 KB block size
full 4-disk RAID5, 256 KB block size
Check RAID types to which entropy analysis is applied
RAID10
RAID0
RAID6
JBOD
RAID1
RAID5
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
Check what you can get with entropy analysis
spot synchronous RAIDs
original number of disks
spot asynchronous RAIDs
disk order ideas
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
Choose to what you should apply the entropy analysis
full disk set
each disk separately
Look at the picture on the right and choose the appropriate description
selected number of disks is wrong
selected block size is less than the actual block size
selected block size is larger than the actual block size
Next lesson - Parity Analysis
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