How increase size of raid 10 in proxmox ZFS pool?

And that's it? No further configuration is required in Proxmox?
Thats basically it.

But...
1.) depending on the number of disks you add you maybe want to increase the volblocksize for better performance
2.) I personally would add the disks by "/dev/disk/by-id/[yourdisk]" instead of "/dev/sd[ef]" so it's easier to identify an disk with problems
3.) Make sure you really add a mirror like zpool add rpool mirror /dev/sde /dev/sdf
 
And in case it is your boot pool, you might want to make the new disks also bootable by adapting the instructions here:
https://pve.proxmox.com/wiki/ZFS_on_Linux#_zfs_administration -> "Changing a failed bootable device"
Jup, but not really needed. By default when creating a raid10 via the webUI it will also only create the boot partitions on the first mirror but not on the second/third/... mirror. Once both disks of the first mirror fail at the same time you wouldn't be able to boot anymore as the other disks ren'T bootable...but on the other hand all data on that pool is then lost anyway... ;)

But would indeed be an important step when adding more disks to an existing bootable vdev (like when turning a single disk into a mirror, turning a 2 disk mirror into a 3 disk mirror or later when extening a raidz1/2/3 onc that feature will be added).
But won't hurt to add the bootloaders if you for some reason like to add them.
 
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Once both disks of the first mirror fail at the same time you wouldn't be able to boot anymore as the other disks ren'T bootable...but on the other hand all data on that pool is then lost anyway... ;)

You are absolutely right, of course. I did not think far enough. :eek:
 

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