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6 switching over to dual-amu, Prerequisites, Procedure – ADIC Switches User Manual

Page 36

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4-8

Operation

DOC D00 025-A

4.6

Switching 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

Wvr

menu with the

G‚tÃ

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

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

XJ11

XJ3

XJ5

X17