SCSI and I/O 8-39
Preventive Maintenance
There is no preventative maintenance required for this product.
Troubleshooting
This hard disk drive should be replaced as a complete assembly. It is assumed the customer maintains a
regular data back schedule, so if the disk drive fails and must be replace, customer data can be restored to
the new disk drive.
To troubleshoot the disk drive, check the following:
• Drive Busy light (flashing=activity, off = no activity)
• Internal drive logs (See SCSIDSK2 Interactive section)
Exchange Part Number
The exchange part number is A3351-69001
Diagnostics
• SCSIDSK2
• IOMAP
• SYSMAP
J5 1-2 SCSI ID 0 Open: SCSI address bit 0 set to 0.
Jumpered: SCSI address bit 0 set to 1.
3-4 SCSI ID 1 Open: SCSI address bit 1 set to 0.
Jumpered: SCSI address bit 0 set to 1.
5-6 SCSI ID 2 Open: SCSI address bit 2 set to 0.
Jumpered: SCSI address bit 0 set to 1.
7-8 SCSI ID 3 Open: SCSI address bit 3 set to 0.
Jumpered: SCSI address bit 0 set to 1.
9-10 Unit Active
LED
Provides connection for drive action LED. Pin 9=cathode, pin 10=anode.
11-12 Spindle Sync Provides connection for spindle sync. Pin 11 = SSREF, Pin 12 = gnd.
Table 8-18 A3351A Configuration Jumper Descriptions
Connector/
Pin Set
Function Function Description
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