Home
RAID
Partition
Filesystem
NAS
Tricks
Contact
About us
RAID Recovery Course - Overall Test
Look at the picture on the right and guess the possible RAID level
RAID6 with a missing disk
Full RAID6
Full RAID 6 with a hotspare
RAID 5 with a blank disk
What is the recommended approach to check the quality of RAID recovery
check many small files, smaller or equal to block size
folder tree check is enough
check large files, larger than several block sizes
NASes only use software RAID
true
false
Where is RAID metadata stored?
at the beginning of the member disk
anywhere, depending on the implementation specifics
at the end of the member disk
Check what you can get with entropy analysis
spot asynchronous RAIDs
spot synchronous RAIDs
disk order ideas
original number of disks
block size
When to apply parity analysis?
after entropy analysis
before zero and mirror analysis
after zero and mirror analysis
between zero and mirror analysis
Is it possible to recover data form a RAID0 in which one of the member disks failed?
yes, all the data can be recovered
yes, but only half of the data can be recovered
no, for all practical purposes it is impossible since all you get are files no larger than block size
Look at the picture on the right and choose the most complete configuration
4-disk RAID5 with one disk missing, 32 KB block size
full 4-disk RAID5, 32 KB block size
full 4-disk RAID5, 16 KB block size
full 4-disk RAID5, 64 KB block size
When you should do parity analysis?
always
when content analysis is done but RAID level is still unknown
after entropy analysis
Look at the picture on the right and guess the possible RAID level
RAID10
Full RAID5
RAID 5 with a missing disk
Full RAID 5 with a hotspare
Return to the list of lessons