ReclaiMe Data Recovery Training

Partition Recovery Course - md-raid Test

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

true
false

Check operating system md-raid is used with

Windows
Linux
MacOS

How the number of a disk in the array is called in md-raid?

disk function
disk identifier
role

What is the difference between 1.x versions of md superblock?

superblock format
superblock configuration
superblock location

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

Check what md superblock versions exist

2.x
1.x
0.8
0.9

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

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

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

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

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

the disks will use the same partition layout
md superblocks are located at the same offset in the beginning of the disks
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 end of the disks

md-raid allows to create arrays without superblocks at all

false
rue

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.