rebuild Raid 1 after disk failure
by giobaxx from LinuxQuestions.org on (#52PME)
Hello Guys
I need some help because I will have to replace a disk in a Linux Workstation and rebuild its Software Raid1. For Sure before start I will run a full data backup but I never did a RAID repair, so I need to be sure about the step I have to follow. The system should be configured like below, could you tell me if the procedure i wrote is correct or no:
Quote:
I have sda2 that is marked as failed I have to replace I need to mark all the partition /dev/sdb as failed
mQuote:
then I will remove all the partition from the raid:
Quote:
Then I shut down the system and I will replace the disk where I have to create the same partition type I have in sda
Quote:
and then I will add the partition to the raid system
Quote:
Is it correct what I wrote? I hope yes, now what it make me more concerned if the RAID software needs boot in UEFI mode. If I remember well in this case I should have a standard Partition /boot/efi and I hould have a situation like this
/Quote:
Now If the broken disk were sda we need to repair not only the Raid partitions but also reinstall the /dev/sda1 with the efi partition to make the system bootable again. In this case there is a way to proceed?
Thanks in Advance.
Gio
I need some help because I will have to replace a disk in a Linux Workstation and rebuild its Software Raid1. For Sure before start I will run a full data backup but I never did a RAID repair, so I need to be sure about the step I have to follow. The system should be configured like below, could you tell me if the procedure i wrote is correct or no:
Quote:
md0 /dev/sda1 + /dev/sdb1 where is mounted the Swap Partition md1 /dev/sda2 + /dev/sdb2 where is mounted the / Partition md2 /dev/sda3 + /dev/sdb3 where is mounted the Swap Partition |
I have sda2 that is marked as failed I have to replace I need to mark all the partition /dev/sdb as failed
mQuote:
| dadm --manage /dev/md0 --fail /dev/sdb1 mdadm --manage /dev/md1 --fail /dev/sdb2 mdadm --manage /dev/md2 --fail /dev/sdb3 |
then I will remove all the partition from the raid:
Quote:
| mdadm --manage /dev/md0 --remove /dev/sdb1 mdadm --manage /dev/md1 --remove /dev/sdb2 mdadm --manage /dev/md2 -remove /dev/sdb3 |
Then I shut down the system and I will replace the disk where I have to create the same partition type I have in sda
Quote:
| sfdisk -d /dev/sda | sfdisk /dev/sdb |
and then I will add the partition to the raid system
Quote:
| mdadm --manage /dev/md0 --add /dev/sdb1 mdadm --manage /dev/md1 --add /dev/sdb2 mdadm --manage /dev/md2 -add /dev/sdb3 |
Is it correct what I wrote? I hope yes, now what it make me more concerned if the RAID software needs boot in UEFI mode. If I remember well in this case I should have a standard Partition /boot/efi and I hould have a situation like this
/Quote:
| dev/sda1 Where is Mounted /boot/efi md0 /dev/sda2 + /dev/sdb2 where is mounted the Swap Partition md1 /dev/sda3 + /dev/sdb3 where is mounted the / md2 /dev/sda4 + /dev/sdb4 where is mounted /Home |
Now If the broken disk were sda we need to repair not only the Raid partitions but also reinstall the /dev/sda1 with the efi partition to make the system bootable again. In this case there is a way to proceed?
Thanks in Advance.
Gio