Mirror down in SunFire 240R

From: Andreas Höschler (ahoesch@smartsoft.de)
Date: Tue Mar 29 2005 - 15:19:45 EST


Dear managers,

we have a production machine Sun Fire 240 with two mirrored 73 GByte
SCSI-disks. The mirror was fine for a year. Now I get the following:

bash-2.05# metastat
d3: Mirror
     Submirror 0: d13
       State: Okay
     Submirror 1: d23
       State: Needs maintenance
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 10247232 blocks (4.9 GB)

d13: Submirror of d3
     State: Okay
     Size: 10247232 blocks (4.9 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t0d0s3 0 No Okay Yes

d23: Submirror of d3
     State: Unavailable
     Size: 10247232 blocks (4.9 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t1d0s3 0 No - Yes

d1: Mirror
     Submirror 0: d11
       State: Okay
     Submirror 1: d21
       State: Needs maintenance
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 14337984 blocks (6.8 GB)

d11: Submirror of d1
     State: Okay
     Size: 14337984 blocks (6.8 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t0d0s1 0 No Okay Yes

d21: Submirror of d1
     State: Unavailable
     Size: 14337984 blocks (6.8 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t1d0s1 0 No - Yes

d0: Mirror
     Submirror 0: d10
       State: Okay
     Submirror 1: d20
       State: Needs maintenance
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 114591936 blocks (54 GB)

d10: Submirror of d0
     State: Okay
     Size: 114591936 blocks (54 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t0d0s0 0 No Okay Yes

d20: Submirror of d0
     State: Unavailable
     Size: 114591936 blocks (54 GB)
     Stripe 0:
         Device Start Block Dbase State Reloc Hot Spare
         c1t1d0s0 0 No - Yes

Device Relocation Information:
Device Reloc Device ID
c1t1d0 Yes id1,sd@SSEAGATE_ST373307LSUN72G_3HZ6Y3DJ00007431G1EF
c1t0d0 Yes id1,sd@SSEAGATE_ST373307LSUN72G_3HZ6Y1YR00007431G08H

The system is up and running but very obviously there is something
wrong with the second disk. I have never encountered such a situation
and am not sure what to do now. I would really appreciate your hints
before I do something wrong with a production machine.

Thanks a lot in advance!

Regards,

   Andreas
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