ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

Check what determines the quality and complexity of NAS recovery in case of one or several member disk failures?

actions of a client after disk failure
how much time has passed since the disk failure
the state of RAID metadata (md/LVM)

Does it make sense to launch two data recovery tools in turn over the same set of NAS disks?

yes, to be sure that nothing is overlooked due to difference in data recovery algorithms
no, it is just a waste of time, all major data recovery tools work the same way

In case of filesystem damage you need to

do file recovery
do RAID recovery first and then file recovery
create regions on NAS disks, do RAID recovery, and then file recovery

In case of filesystem damage you need to recover an array configuration

false
true

In case of filesystem damage LVM and md-raid metadata are usually correct

true
false

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

Filesystem damage in most cases is associated with

disk failure
NAS box failure
operator errors

If md metadata is damaged then

you need to recover RAID configuration
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 only if disks were upgraded

When you do not need to recover RAID configuration when recovering a NAS?

LVM and md metadata are good
you deal with RAID5 with all disks present
you deal with XFS
you deal with RAID5 with one disk missing

Check the most common types of NAS failure

filesystem failure
NAS box failure
disk failure

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