IBM 2658 Hardware Maintenance Manual - Page 8

Hard Disk Drive Replacement Strategy Always try to run a low-level format before replacing a hard disk drive. Attention: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be over-written if you select an incorrect drive. How to Use Error Messages Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. The cause of the first error code can result in false error codes being displayed. If no error code is displayed, see if the error symptom is listed in the Symptom-to-FRU Index for the computer you are servicing. How to Read POST Error Messages POST error messages are displayed on the screen as three, four, five, or eight digits. The error messages that can be displayed as shorter POST messages are highlighted in this index. Some digits will represent different information for SCSI errors versus non-SCSI errors. All SCSI devices are set to a different SCSI ID. Duplicate SCSI ID settings can generate a false error message. Use the SCSI ID to determine whether the error message is coming from an internal or an external device. Drive and Diskette Compatibility Matrix The following table provides identification information for 3.5-inch drives. Diskette Drive 3.5-Inch - 1.44MB 3.5-Inch - 2.88MB Identifying Mark 1.44 on the eject button 2.88 on the eject button The following table provides compatibility information for 3.5-inch diskettes and 3.5-inch diskette drives. Diskette Capacity 1.0MB 2.0MB 4.0MB 1.44MB Drive Read/Write Read/Write Not Compatible 2.88MB Drive Read/Write Read/Write Read/Write 2 ThinkPad R32 Series