
Common disk subsystem problems 19-5
Disk problems identified by SEERs
Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999
Drive error 129 indicates the disk cannot be seen by the
system. This is the most common error message. It is usually
caused by incorrect SCSI ID jumpering on the drive itself or by
a bad connection along the SCSI bus.
• Verify that the disk drive is properly seated.
• Check the jumpers on the disk drive. See Chapter 7 for
details.
• Verify that the SCSI cable and power cable from the disk
drive to the drive plate connectors are each firmly attached
at both ends.
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