2 of 6 Drives Unavailable after power outage, Zpool now Unavailable

[Gblake65]

Had a power outage while I was away that ran down the UPS and crashed the NAS system. On rebooting my zpool is now unavailable and 2 of my 6 drives are no longer showing in the Storage-Drives view

Code:

root@Blake-NAS[~]# zpool import
   pool: Storage
     id: 9938898550801422765
  state: UNAVAIL
 status: One or more devices are missing from the system.
 action: The pool cannot be imported. Attach the missing
        devices and try again.
   see: http://illumos.org/msg/ZFS-8000-3C
 config:

        Storage                                         UNAVAIL  insufficient replicas
          raidz1-0                                      UNAVAIL  insufficient replicas
            1210340747327398733                         UNAVAIL  cannot open
            7564882823893351681                         UNAVAIL  cannot open
            gptid/a6062863-fbf9-11e8-a1d3-d05099d11aa0  ONLINE
            gptid/a71c5c97-fbf9-11e8-a1d3-d05099d11aa0  ONLINE
            gptid/a834d732-fbf9-11e8-a1d3-d05099d11aa0  ONLINE
            gptid/a9759635-fbf9-11e8-a1d3-d05099d11aa0  ONLINE

I took the two drives that are UNAVAIL and connected them to my laptop via a USB to SATA cable. The drives are discovered but show as uninitialized. Looks like the partition information is corrupt. The zpool was set up as a RaidZ2 so I should be able to survive a 2 drive loss right? Really need to get these back up and running as they contain Tax information :( - Yes I should have a back up but I am an idiot -

Any help would be extremely helpful. I have been racking my brain on this for 2 days now.

• AsRock C2750-D4I
• Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
• RAM - 16317 MiB
• Hard drives: 6 - 3 Seagate 4 Tb NAS Drives and 3 WD red 4 Tb NAS Drive
• RAID configuration: RAID Z2
• boot drives - USB
• Hard disk controllers: 2x Marvel SATA
• Version: FreeNAS-11.2-U7

 

[Apollo]

Freenas 11.2-U7 is recent, this begs the question how hold is your configuration and if you did a recent update or a fresh install.
You should try rebooting the system with all the drives plugged in and load previously stable version of Freenas if you have it.

 

[Gblake65]

I had just updated it hoping that would fix the issue. It was running stable few a few months after I update it from ver 9 to 11 last year in July 2018. dont know where I can get ver 9

 

[blueether]

are the missing drives on the same sata bus?

zpool would suggest that you created the pool as raidz1

 

[Gblake65]

I have moved them around and it doesn’t matter the Sata input. I believe they were on the same controller when the system crashed

 

[Gblake65]

Anyone have any ideas on how to save the pool?

 

[jon_2112]

This is a RAIDZ1, not a RAIDZ2. If two of your drives are hosed, your data is gone.

 

[G8One2]

I agree, your data is likely lost.