Added disks the wrong way, how do I fix it?

crazychip

crazychip

Hi. I have a raidz with two disks that I have restored a backup to and started using. The intention was that when the next two disk that I had ordered arrived I would add them.
Problem is that once I got the next two disks I did this:
# zpool add -f storage ada1 ada3

That seemed to work like I wanted, but checking the zpool status I instantly realize that there should probably have been a raidz in that command somewhere.
Code: 
  pool: storage
 state: ONLINE
 scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        storage     ONLINE       0     0     0
          raidz1-0  ONLINE       0     0     0
            ada0    ONLINE       0     0     0
            ada2    ONLINE       0     0     0
          ada3      ONLINE       0     0     0
          ada1      ONLINE       0     0     0

errors: No known data errors

Trying to remove them I get this:
Code: 
# zpool remove storage ada3 ada1
cannot remove ada3: only inactive hot spares, cache, top-level, or log devices can be removed
cannot remove ada1: only inactive hot spares, cache, top-level, or log devices can be removed
 
I know, but it only requires a minimum of two disks to be created. And since I knew that two more disk was on their way I just went ahead and made the raidz with two. (planning on adding the two other disks to it once they arrived.)
 
You can't add the new disks to the existing RAID set. You can create a new RAID set and add them to the pool.

I'd backup all data and recreate the RAID set with all four drives.
 
You cannot add more disks to an existing vdev, you can only add more vdevs. You can also not remove any disks from a vdev, or remove a (storage) vdev. The only exception is that you can 'detach' a disk from a 2/3/N way mirror, even going as far as to turn it back into a single disk vdev and 'attach' to make a single disk into 2/3/N way mirror.

If you hadn't gone straight in with the -f, you would of got the following warning:
(Seriously, don't use -f unless you try something that gives an error/warning and you intentionally want to override it)

Code: 
invalid vdev specification
use '-f' to override the following errors:
mismatched replication level: pool uses raidz and new vdev is disk

The easiest thing is to move the data off onto another disk (USB for example, if you have one) and recreate the pool with all 4 disks. You could do it with just the 4 disks (if your data will fit on one of them) but it's a bit more hassle.
 
Luckily I have been working with faults on this servers ZFS for a while now so I have a 2TB NAS drive that I am borrowing from a friend. I will take a new backup to that and destroy/recreate the pool with all four disks.
 
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