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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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