Setting up an alternate installation device

Before you use an alternate installation device, you need to ensure that you define it on a bus, and you must enable the device.

You need to record and keep the logical address of the system bus and system card at which the alternate installation device is attached. If you have the device set up on a different bus and you do not have this information available, you will not be able to complete installations or recoveries.

It is helpful to record the tape or optical drive's serial number that you plan to use as the alternate installation device.

If you change the configuration of your system, you need to ensure that this information is correct before you start to use the alternate installation device.

To set the addresses and enable the alternate installation device, perform the following steps:

Note: You need to know the password for dedicated service tools (DST) to perform this procedure.

Place the media that contains the current release Licensed Internal Code into the primary installation device.
Set the system mode to Manual. Then perform an initial program load (IPL) using this command:
```
PWRDWNSYS OPTION(*IMMED) RESTART(*YES) IPLSRC(B)
```
Note: The default value for the Power Down System (PWRDWNSYS) command is to display a confirmation. This can be changed by specifying *NO for the Confirm (CONFIRM) parameter: CONFIRM(*NO).

Alternative: An alternative to this step is to select function 21 (Dedicated service tools). If you use this alternative, the next step is step 4. You will not need to perform step 12.
Logical partition users:
- If you are using Hardware Management Console (HMC), see the Managing the Hardware Management Console (HMC) topic.
When the IPL or Install the System display appears, select option 3 (Use dedicated service tools (DST)) and press the Enter key.

The Dedicated Service Tools (DST) Sign On display appears.

                      Dedicated Service Tools (DST) Sign On
                                                               System:   SYSTEMA
 Type choices, press Enter.
    Service tools user . . . . . . . . . . . .  QSECOFR
    Service tools password . . . . . . . . . .  _______

Sign on using the QSECOFR user profile.

Note: Do not sign on with a profile other than QSECOFR.

The Use Dedicated Service Tools (DST) menu appears. From the Use Dedicated Service Tools (DST) menu, perform the following tasks:
1. Select option 5 (Work with DST environment).
2. Select option 2 (System devices) on the Work with DST Environment display.
3. Select option 5 (Alternate installation device) on the Work with System Devices display.
4. Select your device type on the Select Media Type display.

The Select Alternate Installation Device display lists available devices. End of change

                   Select Alternate Installation Device
                                                            System:   SYSTEMA

 Additional devices may be available for use.  Press F5 to see
 if any additional devices have been detected.

 Type option, press Enter.
   1=Select   5=Display details

          Bus      Resource                    Serial
 Option   Number   Name         Type   Model   Number           Selected
            16     TAP22        3592   01A     13-1300283
            16     TAP23        3592   E05     13-1350492
            16     TAP24        3592   01A     13-1300291
            16     TAP25        3592   E05     13-1350477
            16     TAP26        3580   002     00-0110666
            16     TAP27        3590   E1A     13-C1610
            16     TAP28        3590   E1A     13-C1599
            16     TAP29        3590   01A     13-AB733
            16     TAP30        3590   01A     13-AB388
            16     TAP31        3580   003     00-19944
                                                                        More...
 F2=Deselect device   F3=Exit   F5=Refresh   F12=Cancel

From this display, type a 5 (Display details) next to the resource you want to view details and press the Enter key. End of change

The Display Device Details display appears.
```
                            Display Device Details
                                                            System:   SYSTEMA
 Resource                                Serial
 Name            Type        Model       Number
 TAP23           63A0        001         13-1355555

 Location    . . . . . . . . . . . . . :   UTMP3.C01.01B7A4G-DB3-D41


 Logical address:
  Bus:
   System bus  . . . . . . . . :      16
   System board  . . . . . . . :       0
   System card . . . . . . . . :      32

  Storage:
   I/O bus number  . . . . . . :       0
   Controller  . . . . . . . . :      14
   Device address  . . . . . . :       0



 F3=Exit   F12=Cancel    
```
You need to have a record of the addresses assigned to the alternate installation device selected for installing a system. Record the following information:
- Type/Model: _________
- System bus: _________
- System card: _________
- Serial number: _________
Notes:
- You might want to repeat this process to record the addresses for all alternate installation devices that appear in step 6. You should store this information in a safe place, such as the location where your recovery information and recovery media are stored.
- If more than one alternate installation device is defined, only one can be enabled.
- You should ensure that only one device contains valid installation media. This prevents you from loading the wrong version of the Licensed Internal Code.
Press the Enter key.
The Select Alternate Installation Device display appears. Type 1 (Select) next to the resource you want and press the Enter key.
You should see the following message at the bottom of the display:
```
Alternate installation device selected
```
Press F3 (Exit) to return to the Use Dedicated Service Tools (DST) display.

Press F3 (Exit) again. The Exit Dedicated Service Tools (DST) display appears.

                          Exit Dedicated Service Tools (DST)
                                                            System:   SYSTEMA
 Select one of the following:
 
      1. Exit DST
      2. Resume dedicated service tools

Type 1 (Exit Dedicated Service Tools (DST)) and press the Enter key.

The next display you see is the IPL or Install the System display. Type 1 (Perform an IPL) and press the Enter key to complete the procedure.