The 670 MB SCSI disk drive might be failing.
Use the following table to determine the part number for the field replaceable unit (FRU).
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 951 | Any | 53F3429 | 670 MB SCSI disk drive | |
| 951 | Any | 6373521 | Disk drive logic card |