Hard disk error

[Rilawich Ango]

Hi,
  I have a SEAGATE 500G HD.    I got the following errors in dmesg
when I connect it thro' USB to fedora 10.  Anyone can tell me what is
the error means?  Any chance to get back the data from this HD, how?
ango

May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Add. Sense: No
additional sense information
May 15 00:29:42 localhost kernel: usb 1-6: USB disconnect, address 5
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: Dev sdd: unable to read RDB block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
May 15 00:29:42 localhost kernel: end_request: I/O error, dev sdd, sector 0
May 15 00:29:42 localhost kernel: Buffer I/O error on device sdd,
logical block 0
May 15 00:29:42 localhost kernel: unable to read partition table
May 15 00:29:42 localhost kernel: sd 5:0:0:0: [sdd] Attached SCSI disk
May 15 00:29:42 localhost kernel: sd 5:0:0:0: Attached scsi generic sg5 type 0
^C