ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

Filesystem damage in most cases is associated with

operator errors
disk failure
NAS box failure

If both LVM and md metadata are good then

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

What is the first step in NAS recovery?

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

Check the most common types of NAS failure

disk failure
filesystem failure
NAS box failure

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

In case of filesystem damage you need to

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

If md metadata is damaged then

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

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

true
false

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)

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

false
true

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