How to add new device to ZFS mirror?

[Whattteva]

Hi, I'm trying to add a new device to a mirror vdev.

I did this command zpool attach rpool <existing_disk_id> /dev/sdc and this works fine, but when I look at the partition table, it seems like it only replicates the ZFS data, but not the BIOS and EFI boot partitions that the other two disks in the vdev has. How do I make sure these partition tables also get replicated?

 

[leesteken]

Please look for "Changing a failed bootable device" in the manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_zfs
I know you are not replacing an exiting failed drive, but it's mostly the same. There is also information about this on this forum: https://forum.proxmox.com/search/66...t=post&c[child_nodes]=1&c[nodes][0]=16&o=date

 

[Whattteva]

Thanks. So I actually asked because I wasn't sure how to modify that replacement into just a simple addition, and I was worried I was going to overwrite or just done something horribly wrong and render the system unbootable/unrecoverable.

Here are the steps I took for reference to whomever wants a straight-shot process. The following code assumes that /dev/sda and /dev/sdb are the two existing disks in the mirror vdev and /dev/sdc is the new disk to be added. I also used fdisk -l to figure out the currently attached disks and their partition tables. Also, the id's for the last attach command can be obtained by using ls -lh /dev/disk/by-id

sgdisk /dev/sda -R /dev/sdc
sgdisk -G /dev/sdc
zpool attach rpool ata-INTEL_SSD-part3 ata-MZ7KM960-part3