Probably Hardware Trouble But What Is It?

[Drew Tomlinson]

I'm running FBS 9.1 RELEASE that I built several years ago.  It's mostly 
a Samba server and has "just worked" so I've never done much more with 
it.  However recently, I find it "locked up" with thousands of these 
messages on the console:

kernel: kern.maxfiles limit exceeded by uid 0, please see tuning(7)

I've looked in /var/log/messages and also see lots of messages like these:

Dec  6 13:55:53 vm kernel: siisch0:  ... waiting for slots 18000000
Dec  6 13:55:53 vm kernel: siisch0: Timeout on slot 28
Dec  6 13:55:53 vm kernel: siisch0: siis_timeout is 00040000 ss 78000000 
rs 78000000 es 00000000 sts 801b0000 serr 00000000
Dec  6 13:55:53 vm kernel: siisch0:  ... waiting for slots 08000000
Dec  6 13:55:55 vm kernel: siisch0: Timeout on slot 27
Dec  6 13:55:55 vm kernel: siisch0: siis_timeout is 00040000 ss 78000000 
rs 78000000 es 00000000 sts 801b0000 serr 00000000
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): FLUSHCACHE48. ACB: ea 
00 00 00 00 40 00 00 00 00 00 00
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): CAM status: Command timeout
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): Retrying command
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): READ_FPDMA_QUEUED. ACB: 
60 01 fe d8 74 40 39 00 00 00 00 00
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): CAM status: Command timeout
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): Retrying command
Dec  6 13:55:55 vm kernel: (ada0:siisch0:0:0:0): READ_FPDMA_QUEUED. ACB: 
60 0a a5 7f 00 40 4c 00 00 00 00 00

This machine uses zfs.  I have two pools:

# zpool list
NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
zback  1.81T   848G  1008G    45%  1.00x  ONLINE  -
zroot  1.81T  1.16T   666G    64%  1.00x  ONLINE  -

Then I tried this and my ssh window is now stuck:

# zpool status
   pool: zback
  state: ONLINE
status: One or more devices are faulted in response to IO failures.
action: Make sure the affected devices are connected, then run 'zpool 
clear'.
    see: http://illumos.org/msg/ZFS-8000-HC
   scan: none requested
config:

         NAME        STATE     READ WRITE CKSUM
         zback       ONLINE       3     0     0
           ada0      ONLINE       4     0     0

I opened another ssh window and tried 'zpool clear zback' as suggested 
but it appears stuck too.

I'm sure I haven't provided all the relevant information so please ask 
and I will do so.  I'd appreciate any guidance on how to take a proper 
backup of ada0 and what I should do next.  I think this zback pool is 
just the one disk which is a 2TB drive.  I'd like to know how to confirm 
that if possible since it seems the zpool commands aren't able to complete.

I appreciate any suggestions or guidance.

Thanks,

Drew

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