5.3.1 Handling FRUs
Static electricity can damage FRUs. When you handle FRUs, follow the rules in
Table 5–2.
Table 5–2 Handling FRUs
Rule
Action
1
Wear an electrostatic discharge (ESD) wrist strap.
2
When possible, use a grounded ESD workmat.
3
Attach both the wrist strap and the workmat to the system chassis.
4
Before you remove the FRU from the antistatic box, be sure you ground the box
to the system chassis.
5
Wear an ESD wrist strap when you remove the FRU from the antistatic box.
6
Ask the operator or system manager to shut down the zone you will be working
in.
5.3.2 Shutting Down a Zone
Typically, the shutdown is performed by the operator or the system manager.
1.
Enter the SHOW ZONE command to see the status of each zone.
•
Active — The zone is running.
•
Stopped — The zone is not running the operating system. It may be
running diagnostics or is available for synchronizing.
•
Absent — The zone is not available.
•
Synchronizing — The zone is synchronizing with the other zone.
•
Providing I/O only — The zone has detected a CPU/MEM fault, and has
placed the CPU and memory off line.
2.
Enter the STOP/ZONE zone-id command.
3.
At the zone control panel (A or B), simultaneously press both Logic Power -
OFF switches to remove logic power from the zone.
Note
Pressing the Logic Power - OFF switches does not affect the fan or the
expansion cabinet power unless the drives (disk or tape) are turned off. If
the drives are turned off, the fan will run for about 30 seconds after you
press the switches.
5–4 Error Handling and Analysis