ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

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

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
LVM and md metadata are good
you deal with XFS

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)

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

false
true

Filesystem damage in most cases is associated with

NAS box failure
operator errors
disk failure

In case of filesystem damage you need to

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

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

false
true

If LVM metadata is bad while md is good, then fully automatic recovery (bypassing RAID recovery stage) is possible

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
fully automatic recovery is impossible without LVM metadata

Check the most common types of NAS failure

disk failure
NAS box failure
filesystem failure

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