ZFS Pool Degraded Can't find disk that was never in pool

[penguin]

Please help. I'm not sure what happened here and I don't want to make things worse.

I have a 2 disk zfs mirror setup that reported itself degraded today

Code: Select all

  pool: ZFSMirrorPool
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
	the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://illumos.org/msg/ZFS-8000-2Q
  scan: none requested
config:

	NAME                     STATE     READ WRITE CKSUM
	ZFSMirrorPool            DEGRADED     0     0     0
	  mirror-0               DEGRADED     0     0     0
	    ada1                 ONLINE       0     0     0
	    4377886813630192841  UNAVAIL      0     0     0  was /dev/ada3

errors: No known data errors

The problem I have looking at this is that the 2nd disk was never /dev/ada3, it was /dev/ada2.

Yesterday I got 2 more drives and added them into the box to test them, I put them on ada3 and ada4, and formatted them successfully(UFSGPT) but only the one on ada4 would mount. I put that problem aside last night, and when I came back this morning my ZFS pool had changed to degraded (and ada3 still won't mount). In testing these drives I did not make any changes to my ZFSpool. Rebooting the nas4free box changes nothing.

What should I do next? Thank you in advance.

[fsbruva]

Questions:
1. What version/Architecture are you using? (Copy and Paste the summary page from the webgui)
2. When you visit Disks --> Management in the webgui, what do you see?
3. When you visit Disks -- > ZFS --> Configuration --> Detected, what do you see?
4. When you visit Disks --> ZFS --> Configuration --> Current, what do you see?
5. Did you add the new disks (ada3 & 4) via the webgui?
6. Did you change any physical cabling on your machine?