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

Check the most common types of NAS failure

NAS box failure
disk failure
filesystem failure

Filesystem damage in most cases is associated with

operator errors
disk failure
NAS box failure

If md metadata is damaged then

you need to recover RAID configuration only if LVM is damaged
you need to recover RAID configuration only if disks were upgraded
you need to recover RAID configuration only if LVM is good
you need to recover RAID configuration

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

false
true

If both LVM and md metadata are good then

you need to recover RAID configuration only if disks were upgraded
you do not need to recover an array configuration
you need to recover RAID configuration anyway

What is the first step in NAS recovery?

clone the disks
ask a client about a NAS and NAS failure
identify the filesystem on a NAS

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

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

What is the recommended approach when recovering an array configuration on NAS disks?

create regions on NAS disks and do RAID recovery on them
do RAID recovery on the physical disks

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

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