Table of Contents

RAID

Copy Partition Scheme

Save to file

sfdisk -d /dev/sda > partitions

Restore from File and force

sfdisk --force /dev/sda < partitions

In one step

sfdisk -d /dev/sda | sfdisk /dev/sdb

Get Disk Serial

Using smartctl

smartctl -i /dev/sda

Check RAID Status

cat /proc/mdstat

Remove a Malfunctioning Disk

Do the Folloing for all partitions of the malfunctioning disk. Note that mark as faill is not necessary or even possible in case the disk is not detected anymore from the OS.

Mark partition as failed

mdadm --manage /dev/md0 --fail /dev/sda1

Remove Partition

mdadm --manage /dev/md0 --remove /dev/sda1

Add New Disk in Array

Repeat for all required partitions

mdadm --manage /dev/md0 --add /dev/sda1

Destroy Metadata

Warning: select the correct physical disk (/dev/sda in example) <sxh bashdd if=/dev/zero of=/dev/sda bs=512 count=8196 dd bs=512 if=/dev/zero of=/dev/sda count=8196 seek=$1)</sxh>

1)
`blockdev –getsz /dev/sda` - 8196