How to add an additional drive to an existing ZFS RAIDZ-1 in Proxmox

filesystemshard driveraid-zvirtualizationzfs

I've a ZFS installation in Proxmox, in particular a RAIDZ-1 file system, for testing purposes (before going on production with this setup) I've added a new drive to the machine, but I'm blocked on this point… What's the command to add the new drive to the zpool?

I've tried with zpool add, but I don't achieve to find the correct combination of commands & params.

This is the result of zpool status of my testing environment:

  pool: rpool
 state: ONLINE
  scan: none requested
config:

    NAME                                     STATE     READ WRITE CKSUM
    rpool                                    ONLINE       0     0     0
      raidz1-0                               ONLINE       0     0     0
        pci-0000:00:10.0-scsi-0:0:0:0-part2  ONLINE       0     0     0
        pci-0000:00:10.0-scsi-0:0:1:0-part2  ONLINE       0     0     0
        pci-0000:00:10.0-scsi-0:0:2:0-part2  ONLINE       0     0     0
        pci-0000:00:10.0-scsi-0:0:3:0-part2  ONLINE       0     0     0
        pci-0000:00:10.0-scsi-0:0:4:0-part2  ONLINE       0     0     0

errors: No known data errors

Thanks in advance! :)

Best Answer

You can't extend the existing raidz1 vdev by adding another disk but you can add another vdev to the pool to increase the pool's capacity. You'll need more than one additional disk if you want to retain redundancy. For example, you could use two disks to add a mirror vdev or 3+ disks for another raidz1 vdev.