ZFS - Replacing Drive

[dthompson]

I know this isn't proxmox per say, but I have a server with a mirrored ZFS drive. One of the drives has started to fail.
If I swap the drive and then resilver it, is there any extra steps I need to do once this is done? I'm currently on the latest release of PVE 6.X.

Do I need to update grub or anything else like that once I add in the replacement drive so that if the other drive fails, or in case of a reboot, the node is still able to boot properly?

Sorry, I've never had to swap out a failed drive for ZFS before so just want to be sure before I rebuild.

Thank you.

 

[Dunuin]

That depends...
If its a disk you also boot from you will probably need to partition it first, write new bootloader and only then replace the ZFS partition.
For PVE its described at chapter "Changing a failed bootable device" in the Wiki: https://pve.proxmox.com/wiki/ZFS_on_Linux#_zfs_administration

 

[dthompson]

Hey, thanks for the reply! That did the trick for me on what I was looking for.

I have another question that maybe you might have the answer to. Can I keep the same disk /dev/sda and format the zpool partition sda2 and then try and resolver before I remove and replace the entire disk?

If so, would this just be fdisk /dev/sda and remove the sda2 partition and then format it for zfs and re-add?

 

[Dunuin]

The ZFS partition is usually the first (in case that disk isn't bootable) or the third partition (in case its bootble).

I don't see the point formating and readding that disk. You said its starting to fail, so it should be replaced as fast as possible.