Public bug reported:

hi all

we now use Ubuntu 12.04.1 to run on DELL R720, with 8x2T SEAGATE
ST32000645SS disk, PERC H310 Mini (Embedded). and we have no hard or
software raid. We use this to run hadoop.

since we had this box to run less then 1 month, the syslog report below
err:

Jan  2 06:37:13 ubuntu kernel: [2172715.204503] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:13 ubuntu kernel: [2172715.204506] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:13 ubuntu kernel: [2172715.204510] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:13 ubuntu kernel: [2172715.204514] Info fld=0x2161c047
Jan  2 06:37:13 ubuntu kernel: [2172715.204516] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:13 ubuntu kernel: [2172715.204521] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 3f 00 01 00 00
Jan  2 06:37:13 ubuntu kernel: [2172715.204529] end_request: I/O error, dev 
sdn, sector 560054343
Jan  2 06:37:15 ubuntu kernel: [2172716.732536] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:15 ubuntu kernel: [2172716.732538] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:15 ubuntu kernel: [2172716.732541] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:15 ubuntu kernel: [2172716.732544] Info fld=0x2161c047
Jan  2 06:37:15 ubuntu kernel: [2172716.732546] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:15 ubuntu kernel: [2172716.732554] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 3f 00 00 80 00
Jan  2 06:37:15 ubuntu kernel: [2172716.732560] end_request: I/O error, dev 
sdn, sector 560054343
Jan  2 06:37:16 ubuntu kernel: [2172718.264376] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:16 ubuntu kernel: [2172718.264379] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:16 ubuntu kernel: [2172718.264382] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:16 ubuntu kernel: [2172718.264385] Info fld=0x2161c047
Jan  2 06:37:16 ubuntu kernel: [2172718.264386] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:16 ubuntu kernel: [2172718.264389] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 47 00 00 78 00
Jan  2 06:37:16 ubuntu kernel: [2172718.264395] end_request: I/O error, dev 
sdn, sector 560054343
Jan  2 06:37:18 ubuntu kernel: [2172719.804991] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:18 ubuntu kernel: [2172719.804995] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:18 ubuntu kernel: [2172719.804998] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:18 ubuntu kernel: [2172719.805002] Info fld=0x2161c047
Jan  2 06:37:18 ubuntu kernel: [2172719.805003] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:18 ubuntu kernel: [2172719.805006] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 47 00 00 48 00
Jan  2 06:37:18 ubuntu kernel: [2172719.805012] end_request: I/O error, dev 
sdn, sector 560054343
Jan  2 06:37:19 ubuntu kernel: [2172721.337705] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:19 ubuntu kernel: [2172721.337708] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:19 ubuntu kernel: [2172721.337711] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:19 ubuntu kernel: [2172721.337714] Info fld=0x2161c047
Jan  2 06:37:19 ubuntu kernel: [2172721.337715] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:19 ubuntu kernel: [2172721.337718] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 47 00 00 50 00
Jan  2 06:37:19 ubuntu kernel: [2172721.337724] end_request: I/O error, dev 
sdn, sector 560054343
Jan  2 06:37:21 ubuntu kernel: [2172722.854495] sd 0:0:11:0: [sdn] Unhandled 
sense code
Jan  2 06:37:21 ubuntu kernel: [2172722.854498] sd 0:0:11:0: [sdn] Result: 
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jan  2 06:37:21 ubuntu kernel: [2172722.854501] sd 0:0:11:0: [sdn] Sense Key : 
Medium Error [current] 
Jan  2 06:37:21 ubuntu kernel: [2172722.854505] Info fld=0x2161c047
Jan  2 06:37:21 ubuntu kernel: [2172722.854506] sd 0:0:11:0: [sdn] Add. Sense: 
Unrecovered read error
Jan  2 06:37:21 ubuntu kernel: [2172722.854509] sd 0:0:11:0: [sdn] CDB: 
Read(10): 28 00 21 61 c0 47 00 00 50 00
Jan  2 06:37:21 ubuntu kernel: [2172722.854515] end_request: I/O error, dev 
sdn, sector 560054343

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1096829

Title:
   12.04 on dell R720, disk failed with large "Result: hostbyte=DID_OK
  driverbyte=DRIVER_SENSE"

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