ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

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

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

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 and only if the disks in a NAS were never upgraded
only with disks of the same size regardless disk upgrades

Check the most common types of NAS failure

NAS box failure
disk failure
filesystem failure

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

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

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

Filesystem damage in most cases is associated with

disk failure
operator errors
NAS box failure

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

What is the first step in NAS recovery?

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

If md metadata is damaged then

you need to recover RAID configuration only if disks were upgraded
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

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

false
true

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