Comment 3 for bug 515023

I can confirm this bug :

[129107.780068] usb 1-3: new high speed USB device using ehci_hcd and address 7
[129107.941130] usb 1-3: configuration #1 chosen from 1 choice
[129107.942274] scsi8 : SCSI emulation for USB Mass Storage devices
[129107.942554] usb-storage: device found at 7
[129107.942558] usb-storage: waiting for device to settle before scanning
[129112.944057] usb-storage: device scan complete
[129112.944776] scsi 8:0:0:0: Direct-Access Hitachi HDT721010SLA360 PQ: 0 ANSI: 2 CCS
[129112.952579] sd 8:0:0:0: Attached scsi generic sg3 type 0
[129112.953003] sd 8:0:0:0: [sdc] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
[129112.954136] sd 8:0:0:0: [sdc] Write Protect is off
[129112.954142] sd 8:0:0:0: [sdc] Mode Sense: 34 00 00 00
[129112.954147] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[129112.956143] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[129112.956151] sdc: sdc1
[129112.976998] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[129112.977006] sd 8:0:0:0: [sdc] Attached SCSI disk
[129121.130068] usb 1-3: reset high speed USB device using ehci_hcd and address 7
[129129.130067] usb 1-3: reset high speed USB device using ehci_hcd and address 7
[129129.601698] sd 8:0:0:0: [sdc] Unhandled sense code
[129129.601705] sd 8:0:0:0: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[129129.601714] sd 8:0:0:0: [sdc] Sense Key : Medium Error [current]
[129129.601723] sd 8:0:0:0: [sdc] Add. Sense: Unrecovered read error
[129129.601732] sd 8:0:0:0: [sdc] CDB: Read(10): 28 00 00 00 00 3f 00 00 08 00
[129129.601751] end_request: I/O error, dev sdc, sector 63
[129129.601759] Buffer I/O error on device sdc1, logical block 0
[129129.601766] Buffer I/O error on device sdc1, logical block 1
[129129.601771] Buffer I/O error on device sdc1, logical block 2
[129129.601777] Buffer I/O error on device sdc1, logical block 3

This is with a drive which works fine in karmic, the bug is reproductible with two different computer running lucid with the same drive. Interestingly, the same drive could not be mounted on karmic alphas because of this bug which looks similar :
https://bugs.launchpad.net/ubuntu/+source/libatasmart/+bug/387161