ReclaiMe Data Recovery Training

Partition Recovery Course - md-raid Test

Superblock is always located before data

true
false

Check what md superblock versions exist

2.x
1.x
0.8
0.9

md-raid allows to create arrays without superblocks at all

rue
false

Check what some NASes can do on the good disks in case of a NAS failure

erase some user data
change array block size
spoil md superblocks
destroy GPT partitions

When recovering md how you should sort superblocks?

by relevance
by size
by generation number

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

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

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 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
md superblocks are located at the same offset in the beginning of the disks

Superblock includes two significantly different parts; one describes a RAID and other – a specific disk

false
true

What is the difference between superblocks among array member disks?

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

Return to the list of lessons

We have a mailing list in which we talk about interesting cases we encounter and share some tips and tricks.