ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

Filesystem damage in most cases is associated with

NAS box failure
disk failure
operator errors

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 regardless disk upgrades
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

If both LVM and md metadata are good then

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

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

false
true

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

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

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 XFS
you deal with RAID5 with one disk missing

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

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

false
true

If md metadata is damaged then

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
you need to recover RAID configuration only if LVM is damaged

In case of filesystem damage you need to

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

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