ReclaiMe Data Recovery Training

Partition Recovery Course - md-raid Test

In what devices md-raid is commonly used?

NASes
DASes
Windows Servers

Where are copies of superblock stored?

only on the first member disk in the end
only on the first member disk in the beginning
on each array disk always in the beginning
on each array disk either in the beginning of the disk or in the end

Check what md superblock versions exist

1.x
0.9
0.8
2.x

md-raid can consist of other mad-raid arrays

true
false

If you know that array member disks, say in RAID 5, are all of the same size, then

md superblocks are located at the same offset in the beginning of the disks
md superblocks are located at the same offset in the end of the disks
the disks will use the same partition layout
md superblocks are located at the same offset either in the beginning or in the end of the disks depending on superblock version

Check methods which can be used to determine a role for a disk

do entropy analysis, if RAID5
guess
do parity analysis, if RAID5

What the size of md-raid superblock

the size depends on NAS manufacturer
1 B
1 sector
1 KB

What is the difference between superblocks among array member disks?

the copies of superblock are identical between array member disks
information about a particular disk

Why earlier superblock versions can give you more information about a RAID?

because such superblocks are typically written to safe place
because when NAS detects a disk failure, it no longer updates superblocks on them
because such superblocks are typically not affected by a rebuild

md-raid allows to create arrays without superblocks at all

false
rue

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