ReclaiMe Data Recovery Training

RAID Recovery Course - Entropy Analysis Test

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

Check the criteria of a correct picture in entropy analysis

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

Check the parameters you should vary in entropy analysis

number of disks
disk order
block size
RAID level

Choose that which has the highest entropy

video
parity in a RAID
text

What has the higher entropy?

parity block in a RAID
data block in a RAID

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

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

Choose that which has the lowest entropy

video
parity in a RAID
text

Next lesson - Parity Analysis

We have a mailing list in which we talk about interesting cases we encounter and share some tips and tricks.