disk error

[  454.245908] end_request: I/O error, dev sdd, sector 975699960
[  454.246191] sd 0:2:3:0: [sdd] Unhandled error code
[  454.246260] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.246416] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.247037] end_request: I/O error, dev sdd, sector 2048
[  454.247294] sd 0:2:3:0: [sdd] Unhandled error code
[  454.247363] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.247496] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.248156] end_request: I/O error, dev sdd, sector 2048
[  454.248419] sd 0:2:3:0: [sdd] Unhandled error code
[  454.248491] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.248624] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.249245] end_request: I/O error, dev sdd, sector 2048
[  454.249452] sd 0:2:3:0: [sdd] Unhandled error code
[  454.249521] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.249653] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.250272] end_request: I/O error, dev sdd, sector 2048
[  454.250416] sd 0:2:3:0: [sdd] Unhandled error code
[  454.250487] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.250614] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.251234] end_request: I/O error, dev sdd, sector 2048
[  454.251404] sd 0:2:3:0: [sdd] Unhandled error code
[  454.251473] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.251605] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.252267] end_request: I/O error, dev sdd, sector 2048
[  454.252444] sd 0:2:3:0: [sdd] Unhandled error code
[  454.252510] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.252641] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.253261] end_request: I/O error, dev sdd, sector 2048
[  454.253511] sd 0:2:3:0: [sdd] Unhandled error code
[  454.253581] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.253714] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 10 00 00 00 08 00
[  454.254333] end_request: I/O error, dev sdd, sector 4096
[  454.254481] sd 0:2:3:0: [sdd] Unhandled error code
[  454.254552] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.254679] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.255299] end_request: I/O error, dev sdd, sector 2048
[  454.255436] sd 0:2:3:0: [sdd] Unhandled error code
[  454.255507] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.255634] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.256296] end_request: I/O error, dev sdd, sector 2048
[  454.256478] sd 0:2:3:0: [sdd] Unhandled error code
[  454.256546] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.256673] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.257293] end_request: I/O error, dev sdd, sector 2048
[  454.257535] sd 0:2:3:0: [sdd] Unhandled error code
[  454.257604] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.257737] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.258357] end_request: I/O error, dev sdd, sector 2048
[  454.258504] sd 0:2:3:0: [sdd] Unhandled error code
[  454.258574] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.258701] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.259321] end_request: I/O error, dev sdd, sector 2048
[  454.259461] sd 0:2:3:0: [sdd] Unhandled error code
[  454.259530] sd 0:2:3:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[  454.259661] sd 0:2:3:0: [sdd] CDB: Read(10): 28 00 00 00 08 00 00 00 08 00
[  454.260319] end_request: I/O error, dev sdd, sector 2048