ReclaiMe Data Recovery Training

NAS Recovery Course - Overall Test

If md metadata is damaged then

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

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
fully automatic recovery is impossible without LVM metadata
only with disks of the same size regardless disk upgrades

In case of filesystem damage you need to

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

Does it make sense to launch two data recovery tools in turn over the same set of NAS disks?

yes, to be sure that nothing is overlooked due to difference in data recovery algorithms
no, it is just a waste of time, all major data recovery tools work the same way

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?

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

Filesystem damage in most cases is associated with

NAS box failure
operator errors
disk failure

Check the most common types of NAS failure

NAS box failure
disk failure
filesystem failure

If both LVM and md metadata are good then

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

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

false
true

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