Errore Disco USB Esterno

Quando attacco il mio disco esterno (Verbatim Media Station da 1TB), il sistema non lo riconosce e il log mostra questi messaggi:

Mar 11 11:05:35 solaris kernel: [ 1428.908418] usb 1-2.4.1: new high speed USB device using ehci_hcd and address 5
Mar 11 11:05:35 solaris kernel: [ 1429.102683] usb 1-2.4.1: configuration #1 chosen from 1 choice
Mar 11 11:05:35 solaris kernel: [ 1429.103178] scsi6 : SCSI emulation for USB Mass Storage devices
Mar 11 11:05:35 solaris kernel: [ 1429.103382] usb-storage: device found at 5
Mar 11 11:05:35 solaris kernel: [ 1429.103386] usb-storage: waiting for device to settle before scanning
Mar 11 11:05:40 solaris kernel: [ 1434.100397] usb-storage: device scan complete
Mar 11 11:05:45 solaris kernel: [ 1439.266281] scsi 6:0:0:0: Direct-Access SAMSUNG HD103SI 1AG0 PQ: 0 ANSI: 0
Mar 11 11:05:45 solaris kernel: [ 1439.267165] sd 6:0:0:0: Attached scsi generic sg4 type 0
Mar 11 11:05:45 solaris kernel: [ 1439.269952] sd 6:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
Mar 11 11:05:45 solaris kernel: [ 1439.281042] sd 6:0:0:0: [sdd] Write Protect is off
Mar 11 11:05:45 solaris kernel: [ 1439.281055] sd 6:0:0:0: [sdd] Mode Sense: 03 00 00 00
Mar 11 11:05:45 solaris kernel: [ 1439.281061] sd 6:0:0:0: [sdd] Assuming drive cache: write through
Mar 11 11:05:45 solaris kernel: [ 1439.287496] sd 6:0:0:0: [sdd] Assuming drive cache: write through
Mar 11 11:06:16 solaris kernel: [ 1439.287515] sdd:
Mar 11 11:06:16 solaris kernel: [ 1470.080124] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:06:16 solaris kernel: [ 1470.252657] sdd1 sdd2 sdd3
Mar 11 11:06:16 solaris kernel: [ 1470.372481] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:06:47 solaris kernel: [ 1501.091997] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:07:18 solaris kernel: [ 1532.092132] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:07:49 solaris kernel: [ 1563.080085] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:08:20 solaris kernel: [ 1594.104435] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:08:20 solaris kernel: [ 1594.376661] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:08:21 solaris kernel: [ 1594.531039] sd 6:0:0:0: [sdd] Unhandled error code
Mar 11 11:08:21 solaris kernel: [ 1594.531051] sd 6:0:0:0: [sdd] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Mar 11 11:08:21 solaris kernel: [ 1594.531059] end_request: I/O error, dev sdd, sector 0
Mar 11 11:08:21 solaris kernel: [ 1594.531070] __ratelimit: 20 callbacks suppressed
Mar 11 11:08:21 solaris kernel: [ 1594.531076] Buffer I/O error on device sdd, logical block 0
Mar 11 11:08:21 solaris kernel: [ 1594.531088] Buffer I/O error on device sdd, logical block 1
Mar 11 11:08:21 solaris kernel: [ 1594.531094] Buffer I/O error on device sdd, logical block 2
Mar 11 11:08:21 solaris kernel: [ 1594.531100] Buffer I/O error on device sdd, logical block 3
Mar 11 11:08:21 solaris kernel: [ 1594.531105] Buffer I/O error on device sdd, logical block 4
Mar 11 11:08:21 solaris kernel: [ 1594.531111] Buffer I/O error on device sdd, logical block 5
Mar 11 11:08:21 solaris kernel: [ 1594.531116] Buffer I/O error on device sdd, logical block 6
Mar 11 11:08:21 solaris kernel: [ 1594.531122] Buffer I/O error on device sdd, logical block 7
Mar 11 11:08:21 solaris kernel: [ 1594.531127] Buffer I/O error on device sdd, logical block 8
Mar 11 11:08:21 solaris kernel: [ 1594.531133] Buffer I/O error on device sdd, logical block 9
Mar 11 11:08:21 solaris kernel: [ 1594.557932] sd 6:0:0:0: [sdd] Assuming drive cache: write through
Mar 11 11:08:21 solaris kernel: [ 1594.557951] sd 6:0:0:0: [sdd] Attached SCSI disk
Mar 11 11:08:51 solaris kernel: [ 1625.072485] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:09:23 solaris kernel: [ 1657.072441] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:09:23 solaris kernel: [ 1657.280350] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:09:54 solaris kernel: [ 1688.072325] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:09:54 solaris kernel: [ 1688.280359] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:10:03 solaris kernel: [ 1696.485463] atkbd.c: Unknown key pressed (translated set 2, code 0x93 on isa0060/serio0).
Mar 11 11:10:03 solaris kernel: [ 1696.485471] atkbd.c: Use 'setkeycodes e013 <keycode>' to make it known.
Mar 11 11:10:03 solaris kernel: [ 1696.645702] atkbd.c: Unknown key released (translated set 2, code 0x93 on isa0060/serio0).
Mar 11 11:10:03 solaris kernel: [ 1696.645711] atkbd.c: Use 'setkeycodes e013 <keycode>' to make it known.
Mar 11 11:10:25 solaris kernel: [ 1719.072345] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:10:56 solaris kernel: [ 1750.072360] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:10:56 solaris kernel: [ 1750.203926] sd 6:0:0:0: [sdd] Unhandled error code
Mar 11 11:10:56 solaris kernel: [ 1750.203938] sd 6:0:0:0: [sdd] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
Mar 11 11:10:56 solaris kernel: [ 1750.203945] end_request: I/O error, dev sdd, sector 1944459405
Mar 11 11:10:56 solaris kernel: [ 1750.203957] __ratelimit: 20 callbacks suppressed
Mar 11 11:10:56 solaris kernel: [ 1750.203964] Buffer I/O error on device sdd3, logical block 0
Mar 11 11:10:56 solaris kernel: [ 1750.203972] Buffer I/O error on device sdd3, logical block 1
Mar 11 11:10:56 solaris kernel: [ 1750.203982] Buffer I/O error on device sdd3, logical block 2
Mar 11 11:10:56 solaris kernel: [ 1750.203988] Buffer I/O error on device sdd3, logical block 3
Mar 11 11:10:56 solaris kernel: [ 1750.203994] Buffer I/O error on device sdd3, logical block 4
Mar 11 11:10:56 solaris kernel: [ 1750.203999] Buffer I/O error on device sdd3, logical block 5
Mar 11 11:10:56 solaris kernel: [ 1750.204004] Buffer I/O error on device sdd3, logical block 6
Mar 11 11:10:56 solaris kernel: [ 1750.204045] Buffer I/O error on device sdd3, logical block 7
Mar 11 11:10:56 solaris kernel: [ 1750.204051] Buffer I/O error on device sdd3, logical block 8
Mar 11 11:10:56 solaris kernel: [ 1750.204056] Buffer I/O error on device sdd3, logical block 9
Mar 11 11:11:27 solaris kernel: [ 1781.072392] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5
Mar 11 11:11:58 solaris kernel: [ 1812.072410] usb 1-2.4.1: reset high speed USB device using ehci_hcd and address 5

Ho installato Ubuntu 9.10.
Il disco da altri PC Windows viene visto regolarmente.

Grazie in anticipo dell'aiuto.