IO ERROR

Oct 20 05:23:32 underground kernel: usb 5-6: new high speed USB device using ehci_hcd and address 16
Oct 20 05:23:33 underground kernel: usb 5-6: configuration #1 chosen from 1 choice
Oct 20 05:23:33 underground kernel: scsi15 : SCSI emulation for USB Mass Storage devices
Oct 20 05:23:38 underground kernel:   Vendor: SanDisk   Model: U3 Cruzer Micro  Rev: 2.17
Oct 20 05:23:38 underground kernel:   Type:   Direct-Access  ANSI SCSI revision: 02
Oct 20 05:23:38 underground kernel: SCSI device sdc: 4001425 512-byte hdwr sectors (2049 MB)
Oct 20 05:23:38 underground kernel: sdc: Write Protect is off
Oct 20 05:23:38 underground kernel: sdc: assuming drive cache: write through
Oct 20 05:23:38 underground kernel: SCSI device sdc: 4001425 512-byte hdwr sectors (2049 MB)
Oct 20 05:23:38 underground kernel: sdc: Write Protect is off
Oct 20 05:23:38 underground kernel: sdc: assuming drive cache: write through
Oct 20 05:23:38 underground kernel:  sdc: sdc1
Oct 20 05:23:38 underground kernel: sd 15:0:0:0: Attached scsi removable disk sdc
Oct 20 05:23:38 underground kernel: sd 15:0:0:0: Attached scsi generic sg2 type 0
Oct 20 05:23:38 underground kernel:   Vendor: SanDisk   Model: U3 Cruzer Micro  Rev: 2.17
Oct 20 05:23:38 underground kernel:   Type:   CD-ROM  ANSI SCSI revision: 02
Oct 20 05:23:38 underground kernel: sr0: scsi3-mmc drive: 8x/40x writer xa/form2 cdda tray
Oct 20 05:23:38 underground kernel: sr 15:0:0:1: Attached scsi generic sg3 type 5