Home
RAID
Partition
Filesystem
NAS
Tricks
Contact
About us
NAS Recovery Course - Overall Test
If both LVM and md metadata are good then
you do not need to recover an array configuration
you need to recover RAID configuration only if disks were upgraded
you need to recover RAID configuration anyway
If LVM metadata is bad while md is good, then fully automatic recovery (bypassing RAID recovery stage) is possible
fully automatic recovery is impossible without LVM metadata
only with disks of the same size regardless disk upgrades
only with disks of the same size and only if the disks in a NAS were never upgraded
If md metadata is damaged then
you need to recover RAID configuration only if disks were upgraded
you need to recover RAID configuration only if LVM is damaged
you need to recover RAID configuration only if LVM is good
you need to recover RAID configuration
When you do not need to recover RAID configuration when recovering a NAS?
you deal with RAID5 with all disks present
you deal with RAID5 with one disk missing
you deal with XFS
LVM and md metadata are good
Filesystem damage in most cases is associated with
NAS box failure
operator errors
disk failure
In case of filesystem damage LVM and md-raid metadata are usually correct
true
false
In case of filesystem damage you need to
do file recovery
create regions on NAS disks, do RAID recovery, and then file recovery
do RAID recovery first and then file recovery
What is the recommended approach when recovering an array configuration on NAS disks?
do RAID recovery on the physical disks
create regions on NAS disks and do RAID recovery on them
In case of filesystem damage you need to recover an array configuration
false
true
Does it make sense to launch two data recovery tools in turn over the same set of NAS disks?
no, it is just a waste of time, all major data recovery tools work the same way
yes, to be sure that nothing is overlooked due to difference in data recovery algorithms
Return to the list of lessons