[OpenIndiana-discuss] Diagnosis help needed

[michelle]

OK - my back is up against the wall.

mich at jaguar:~# zpool status
   pool: data
  state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
         Sufficient replicas exist for the pool to continue functioning in a
         degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
         repaired.
   scan: scrub repaired 7.10M in 24h30m with 0 errors on Mon Jun 25 
18:30:48 2012
config:

         NAME        STATE     READ WRITE CKSUM
         data        DEGRADED     0     0     0
           raidz1-0  DEGRADED     0     0     0
             c2t2d0  ONLINE       0     0     0
             c2t3d0  FAULTED      0   102     0  too many errors
             c2t4d0  ONLINE       0     0     0

errors: No known data errors


The cables appear fine, so I'm dealing with either a controller issue, 
or a hard drive issue, I don't know how to interpret those earlier 
"messages" messages.

I need help please to make the right call, before I potentially loose 
4tb of files.