ZFS [FreeNAS] How screwed am I? Cannot mount pool.

T

themagicm

Running freenas and my pool is no longer available. Here is some output:

Code: 
[root@freenas ~]# camcontrol devlist                                             
<VB0250EAVER HPG9>                 at scbus0 target 0 lun 0 (pass0,ada0)         
<ST2000DM001-1CH164 CC26>          at scbus2 target 0 lun 0 (pass1,ada1)         
<ST2000DM001-1CH164 CC26>          at scbus3 target 0 lun 0 (pass2,ada2)         


gpart :

=>       63  488397105  ada0  MBR  (232G)                                       
         63    1930257     1  freebsd  [active]  (942M)                         
    1930320         63        - free -  (31k)                                   
    1930383    1930257     2  freebsd  (942M)                                   
    3860640       3024     3  freebsd  (1.5M)                                   
    3863664      41328     4  freebsd  (20M)                                     
    3904992  484492176        - free -  (231G)                                   
                                                                                 
=>        34  3907029101  ada1  GPT  (1.8T)                                     
          34          94        - free -  (47k)                                 
         128     4194304     1  freebsd-swap  (2.0G)                             
     4194432  3902834696     2  freebsd-zfs  (1.8T)                             
  3907029128           7        - free -  (3.5k)                                 
                                                                                 
=>      0  1930257  ada0s1  BSD  (942M)                                         
        0       16          - free -  (8.0k)                                     
       16  1930241       1  !0  (942M)                                           
                                                                                 
=>        34  3907029101  ada2  GPT  (1.8T)                                     
          34          94        - free -  (47k)                                 
         128     4194304     1  freebsd-swap  (2.0G)                             
     4194432  3902834696     2  freebsd-zfs  (1.8T)                             
  3907029128           7        - free -  (3.5k)   


[root@freenas ~]# zpool status                                                   
no pools available                                                               
[root@freenas ~]# zpool import                                                   
   pool: big_hoss                                                               
     id: 9148018895844944422                                                     
  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://www.sun.com/msg/ZFS-8000-6X                                       
 config:                                                                         
                                                                                 
        big_hoss                                          UNAVAIL  missing devic
e                                                                               
          gptid/b9f1a6aa-27c2-11e3-b829-c8cbb8c7cc71      ONLINE                 
        spares                                                                   
          dsk/gptid/ba708a08-27c2-11e3-b829-c8cbb8c7cc71                         
                                                                                 
        Additional devices are known to be part of this pool, though their       
        exact configuration cannot be determined.                               
[root@freenas ~]#
 
Ooohh..thats no bueno. If I have 4 drives in there, 1 is a spare and the other is part of the original pool, that means I've most likely lost data. Correct?
 
With RAIDZ you can lose one disk. Lose a second and the whole dataset is gone.
 
You have a backup, right?
(One of these days people must learn that raid-anything is *NOT* a substitute for proper backups)
 
Look through the import section in ZPOOL(8)()

Read and understand these carefully, as it can worsen a situation
# zpool import -D -fFXNnm -R /mnt <poolname-or-ID> -t newname
D-Destroyed
f-force
R-altRoot
N-Nomount
F-Force-import, discard-last-entries
X-Xtreme-rewind(with F)
m-ignore-missing-log
n-dry-run(with F)

If above does not work, you'll have to look at ZDB(8)(), which is a whole other can of worms.
 
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