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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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