ReclaiMe Data Recovery Training

RAID Recovery Course - Entropy Analysis Test

Choose the correct statement

ordered data has high entropy
random data has high entropy

When to apply entropy analysis?

after content analysis
between zero and mirror analysis
before content analysis

Check the parameters you should vary in entropy analysis

RAID level
number of disks
block size
disk order

Look at the picture on the right and choose the most complete configuration description

full 4-disk RAID5, 16 KB block size
4-disk RAID5 with one disk missing, 16 KB block size
full 4-disk RAID5, 32 KB block size
full 4-disk RAID5, 64 KB block size

Look at the picture on the right and choose the appropriate description

selected number of disks is wrong
selected block size is larger than the actual block size
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

Check the criteria of a correct picture in entropy analysis

has one peak per disk
has several peaks
peaks do not overlap
there is one overlap in peaks

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

4-disk RAID5 with one disk missing, 16 KB block size
full 4-disk RAID5, 32 KB block size
full 3-disk RAID5, 16 KB block size, topmost disk doesn't belong to the RAID

Choose that which has the highest entropy

video
parity in a RAID
text

Next lesson - Parity Analysis

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