IBM Netfinity FAStT500, Руководство по установке

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Chapter 3. Starting the controller unit 43
Use the following procedure to turn off power to the controller unit.
1 Prepare the controller unit for shutdown, as follows:
a Stop all I/O activity to the controller unit and attached drive enclosures. Logically
disconnect the controller and drive enclosures from the hosts. Make sure that the
fast write cache indicator light on each controller unit front panel and all applicable
drive active indicator lights on each drive enclosure front panel are off (not
blinking).
Note: If a parity check is in progress, it might take a long time for the drive
indicator lights to stop blinking.
b Make sure that all amber fault indicator lights on the controller unit are off. If any
fault indicator lights are on, correct the problem before turning off the power.
2 Turn off the power switches on the back of the controller unit (see Figure 27 on page
41 for the location of the switches).
3 Turn off any drive enclosures attached to the controller unit.
Turning on the controller unit alarm
You can arm the alarm that is located on the controller fan by setting the switch in the up
position, as shown in
Figure 28 . When the switch is armed, the alarm sounds when a
hardware problem occurs.
Figure 28. Controller unit alarm switch
Alarm switch