Preparing for hot-plug SCSI device or cable deconfiguration

Purpose of this procedure

Use this procedure to determine if a SCSI device or SCSI device cable is causing the symptom.

Disconnect all cables attached to the adapter, (except for the cable to the device from which you boot to run diagnostics; you may want to temporarily move this device to another SCSI port while you are trying to find the problem).

Note: Move this device to another SCSI port while you are trying to find the problem.

Go to Loading and Using the AIX® online diagnostics or the standalone diagnostics and perform the prerequisite tasks described in the "Before you begin" topic.
Determine which SCSI adapter you plan to remove the cables or devices from.
Adapter slots are numbered on the rear of the system unit, record the slot number and location of each adapter being removed.
Ensure that any processes or applications that might use the adapter are stopped.
Enter the system diagnostics by logging in as "root" user or as the "celogin" user. Type the diag command on the AIX command line.
When the "DIAGNOSTIC OPERATING INSTRUCTIONS" menu displays, press Enter. The "FUNCTION SELECTION menu appears.
From the "FUNCTION SELECTION" menu, select "Task Selection", then press Enter.
From the "Task Selection" list, select "PCI Hot Plug Manager".
From the PCI Hot Plug Manager menu, select "Unconfigure a Device", then press Enter.
Press F4 or ESC 4 to display the "Device Names" menu.
Select the adapter from which you are removing the cables or devices in the "Device Names" menu.
In the "Keep Definition" field, use the tab key to answer "Yes".
In the "Unconfigure Child Devices" field, use the Tab key to answer "Yes", then press Enter.
The "ARE YOU SURE" screen displays. Press Enter to verify the information. A successful deconfiguration is indicated by the "OK" message displayed next to the Command field at the top of the screen.
Press F4 or ESC 4 twice to return to the "Hot Plug Manager" menu.
Select "replace/remove PCI Hot Plug adapter".
Select the slot that has the adapter you want to remove the cables or devices from in the system.
Select "remove".
Note: A fast blinking amber LED located at the back of the machine near the adapter indicates that the slot has been identified.
Press Enter. This places the adapter in the "action" state, meaning it is ready to be removed from the system. (Don't need to remove the adapter, unless it makes removing the cables attached to it easier).