User`s guide

10 – Performing Diagnostics
Preparing for Diagnostic Testing
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NOTE: The loopback test must be run with the loopback connector; the read/write
buffer test must be run without the loopback connector on a device that
supports the SCSI Read Buffer and SCSI Write Buffer commands.
10.1
Preparing for Diagnostic Testing
Preparation for the loopback and read/write buffer tests differs. See the following,
as appropriate:
■ Loopback test (see section 10.1.1)
■ Read/write buffer test (see section 10.1.2)
10.1.1
Preparing for the Loopback Test
Perform the following steps before running the loopback test:
1. Modify the adapter settings Connection Options setting (see
section 10.1.1.1).
2. Attach a loopback connector to the Fibre Channel connector on the adapter
(see section 10.1.1.2).
10.1.1.1
Modifying the Adapter Settings Connection Options Setting
Before running the loopback test, the adapter settings Connection Options setting
must be 0—Loop Only. See section 11.1.1 for information about viewing and
modifying the setting. Do the following:
1. Write down the current setting.
2. Change the setting to 0—Loop Only, if not currently set to this option.
After completing the loopback test, change the Connection Options setting back
to its original value.