I f*cked up taking wrong disk offline

[Gertjan]

Hello everyone, i'm running freenas happily for a few months now.
But yesterday one of the disks started producing errors.

Code:

Device: /dev/ada3, 4 Currently unreadable (pending) sectors

So, i went to view the status of the Zvol, the disk was later added to the pool, something tells me not the way it should because the front end shows this..

Vol1Z
- stripe
- - ada3p2
- raidz1-0
- - ada2p2
- - ada1p2
- - ada0p2

What have i done wrong? or haven't?
Well besides that I've made a f*ck up by taking the wrong disk offline (ada0p2 / 8188695242579307915)

Code:

  NAME                                            STATE    READ WRITE CKSUM                                                 
        Vol1Z                                          DEGRADED    0    0    0                                                 
          raidz1-0                                      DEGRADED    0    0    0                                                 
            8188695242579307915                        OFFLINE      0    0    0  was /dev/gptid/acdf1f19-3010-11e3-b0f7-bc5ff4c8d2bc                                                                                                                               
            gptid/ad755e3d-3010-11e3-b0f7-bc5ff4c8d2bc  ONLINE      0    0    0                                                 
            gptid/ae1601d7-3010-11e3-b0f7-bc5ff4c8d2bc  ONLINE      0    0    0                                                 
          gptid/2db06830-707b-11e3-8178-bc5ff4c8d2bc    ONLINE      0    0    0    

Now my question, how can i add the offlined disk again, without losing data. There was nothing wrong with this disk.

 

[cyberjock]

Nope, it's not the way it should be. One disk has no redundancy. Lose that disk, lose that pool!

You are in a crappy way now. I'd just backup the pool, destroy it, then recreate it from scratch.

 

[Gertjan]

Ok, I was afraid of that.
I've put the offline disk back online using console. Looks ok,
I'm now backup-up important data.

Thanks for your help.