[4294833.625000] usb 2-1.1: new full speed USB device using ohci_hcd and address 3
[4294833.895000] SCSI subsystem initialized
[4294833.910000] Initializing USB Mass Storage driver...
[4294833.913000] scsi0 : SCSI emulation for USB Mass Storage devices
[4294833.914000] usb-storage: device found at 3
[4294833.914000] usb-storage: waiting for device to settle before scanning
[4294833.915000] usbcore: registered new driver usb-storage
[4294833.915000] USB Mass Storage support registered.
[4294838.923000]   Vendor: USB       Model: Storage Device    Rev:     
[4294838.923000]   Type:   Direct-Access                      ANSI SCSI revision: 02
[4294838.931000] usb-storage: device scan complete
[4294839.208000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294839.215000] sda: Write Protect is off
[4294839.216000] sda: Mode Sense: 03 00 00 00
[4294839.216000] sda: assuming drive cache: write through
[4294839.295000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294839.343000] sda: Write Protect is off
[4294839.343000] sda: Mode Sense: 03 00 00 00
[4294839.343000] sda: assuming drive cache: write through
[4294839.344000]  sda: sda1
[4294839.356000] sd 0:0:0:0: Attached scsi removable disk sda
[4294840.312000] end_request: I/O error, dev sda, sector 498173
[4294840.312000] Buffer I/O error on device sda1, logical block 498072
[4294840.312000] Buffer I/O error on device sda1, logical block 498073
[4294840.312000] Buffer I/O error on device sda1, logical block 498074
[4294840.313000] Buffer I/O error on device sda1, logical block 498072
[4294840.313000] Buffer I/O error on device sda1, logical block 498073
[4294840.313000] Buffer I/O error on device sda1, logical block 498074
[4294840.313000] Buffer I/O error on device sda1, logical block 498072
[4294840.313000] Buffer I/O error on device sda1, logical block 498073
[4294840.313000] Buffer I/O error on device sda1, logical block 498074
[4294840.314000] Buffer I/O error on device sda1, logical block 498072
[4294840.614000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294840.621000] sda: Write Protect is off
[4294840.622000] sda: Mode Sense: 03 00 00 00
[4294840.622000] sda: assuming drive cache: write through
[4294840.659000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294840.665000] sda: Write Protect is off
[4294840.666000] sda: Mode Sense: 03 00 00 00
[4294840.666000] sda: assuming drive cache: write through
[4294840.666000]  sda: sda1
[4294841.502000] end_request: I/O error, dev sda, sector 498173
[4294841.775000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294841.782000] sda: Write Protect is off
[4294841.783000] sda: Mode Sense: 03 00 00 00
[4294841.783000] sda: assuming drive cache: write through
[4294842.983000] end_request: I/O error, dev sda, sector 498173
[4294843.210000] SCSI device sda: 498176 512-byte hdwr sectors (255 MB)
[4294843.217000] sda: Write Protect is off
[4294843.218000] sda: Mode Sense: 03 00 00 00
[4294843.218000] sda: assuming drive cache: write through