Linux – Clonezilla is not able to clone a RAID 1 disk

clonezillalinuxraid1

I have a HP Server DL320 G5. There are two SATA hard disks configured as RAID 1 through HP embedded RAID controller. Server OS is running GNU/Linux (Fedora)

Server booted up with clonezilla live CD. The image will be stored on a NAS connected through NFS.
Clonezilla could mount the NFS share and could see the two hard disks /dev/sda and /dev/sdb.

I selected /dev/sda for disk cloning. However I could not see the cloning progress and got straight into a prompt for reboot, poweroff, command line

I tried to select /dev/sdb but the same issue.

Best Answer

This can be done with the following kernel parameter while booting the Clonezilla live CD: dmraid=false

In the GRUB menu, select your preferred boot menu item, hit tab, add "dmraid=false" and then press enter. This way, your only imaging one of the drives, which works.

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Linux – How to know which block device maps to which physical drive

The A and B in sda and sdb should map to channels 1 and 2 (or 0 and 1) for your drives. If the system is set up so that they're labeled, you can tell that way. I don't know how your drives are structured with the wiring; I've had them numbered with small print on the motherboard so you can tell what port is going to what drive.

I supposed you could use your idea to then try feeling for vibration from the drives too, if there's enough room for you to feel the drives. Again depends on the way they're mounted.

Lvm – Linux Software RAID1: How to boot after (physically) removing /dev/sda? (LVM, mdadm, Grub2)

You need to install GRUB to the MBR of both drives, and you need to do it in a way that GRUB considers each disk to be the first disk in the system.

GRUB uses its own enumeration for disks, which is abstracted from what the Linux kernel presents. You can change which device it thinks is the first disk (hd0), by using a "device" line in the grub shell, like so:

device (hd0) /dev/sdb

This tells grub that, for all subsequent commands, treat /dev/sdb as the disk hd0. From here you can complete the installation manually:

device (hd0) /dev/sdb
root (hd0,0)
setup (hd0)

This sets up GRUB on the first partition of the disk it considers to be hd0, which you've just set as /dev/sdb.

I do the same for both /dev/sda and /dev/sdb, just to be sure.

Edited to add: I always found the Gentoo Wiki handy, until I did this often enough to commit it to memory.

Best Answer

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Linux – How to know which block device maps to which physical drive

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