ADIC Switches manual Switching over to Dual-AMU, Prerequisites

4.6Switching over to Dual-AMU

On switching over the passive AMU becomes the active AMU and if pos- sible, the active AMU becomes the passive AMU. The connections of the connection cables between AMU computer and control unit must be changed over for the change.

Prerequisites

•2 AMU computers are installed and in operation

•Both AMU computers are configured identically

Procedure

Step 1 Stop the command stream to the system:

•with the “HOLD” command for HACC/MVS

•by “Setting offline” the drives in the system

Step 2 Switch the AML/J off (Stopping the AML/J system on page 4-4).

Step 3 Change over the connections of the following cables at the con- trol rack:

•Scanner interface cable X17 (COM 2)

•Ribbon cables XJ11, XJ5 and XJ3

Step 4 Close the side door of the control cabinet

Step 5 Switch the AMU (B) computer on

Step 6 Open the AMU log in the 9LHZmenu with the /RJ￿command

Step 7 Switch the main switch S3 on the control rack on

Step 8 Switch the host to the Dual-AMU with the corresponding host command

XJ11	XJ3
	XJ5
	X17

Figure 4-3: Plug board of the AML/J control rack

4-8 Operation

DOC D00 025-A