ReclaiMe Data Recovery Training
Home
RAID
Partition
Filesystem
NAS
Tricks
Contact
About us
RAID Recovery Course - Content Analysis Test
Parity test for a full regular RAID5 gives
0% parity in full disk set and 100% parity in all combinations with one disk excluded
0% parity in full disk set and 0% parity in all combinations with one disk excluded
100% parity in full disk set and 0% parity in all combinations with one disk excluded
Check for what parity tests are done
all combinations with one disk excluded
each member disk
full disk set
all disk pairs
If you see one mirror pair in mirror map, it points to
RAID10
RAID5
Ex-hotspare disk
RAID1
Check parity-based RAIDs
RAID1
RAID5
RAID6
RAID4
RAID10
Check the possible RAID levels if parity analysis gives you 0% parity both for full disk set and exclusion combinations
RAID0
RAID6
Regular RAID5
RAID5 with a hotspare disk
RAID5 with a missing disk
Look at the picture on the right and guess RAID level
RAID10
RAID0
RAID1
RAID5
Disks from the same RAID have the same ratio of zeros and average entropy
true
false
What does content analysis help determine?
RAID level
disk order
block size
Look at the picture on the right and check the possible RAID level(s)
RAID10
RAID 5 with a missing disk
RAID0
full RAID5
Look at the picture on the right and guess the possible RAID level
RAID 5 with a missing disk
full RAID 5 with a hotspare
RAID10
full RAID5
Next lesson - Parity Analysis
Copyright © 2013 - 2022
www.ReclaiMe.com
We have a mailing list
in which we talk about interesting cases we encounter and share some tips and tricks.