Intel EK-KZPCM-UG Checking the Scsi Bus Termination, Testing the Scsi Ports, Exer dkb, Showstatus

Chapter 8. KZPCM Host Adapter Diagnostics

8.5Checking the SCSI Bus Termination

A very common SCSI problem is incorrect termination. Refer to Chapter 2, Installing the KZPCM Host Adapter, to determine if the bus is terminated correctly at both ends of the bus, and that no device in the middle has termination enabled.

8.6Testing the SCSI Ports

EXER, a built in test at the SRM console of most systems, can be used to determine if the SCSI ports and disks are functioning correctly.

>>>exer dkb*&

This command instructs EXER to test all disks (dk) on the b channel (dkb*). The & instructs the console to run the command as a background process.

Issue the show_status command to diagnose the port:

>>>show_status

ID	Program	Device	Pass	Hard/Soft		Bytes Written	Bytes Read
--------	--------	-------------	----	---------		------------	----------
00000001	idle system		0	0	0	0	0
000001b9	exer_kid	dkb0.0.0.300	0	0	0	0	502272

EXER will run until it is interrupted with the kill_diag command.

>>>kill_diag

>>>show_status

ID	Program Device	Pass Hard/Soft Bytes Written				Bytes	Read
--------	------- ------	---- --------- -------------				----------
00000001	idle system	0	0	0	0	0

Observe the Hard/Soft error counts from the tests. Hard errors should always be

0.Soft errors are usually 0, and if non-zero, usually indicate a bus that is incorrectly terminated.

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