Silicon Graphics Total Performance 9300, User Manual

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3: Operating Storage Enclosures
Turning the Power Off
The enclosure is designed to run continuously, 24 hours a day. However, you may need
to turn the power off for maintenance, such as upgrading the drives or replacing certain
modules.To turn the power off, follow these steps:
1. Use TPSSM to determine the status of your system components and any special
instructions before proceeding. The operating system software may require you to
perform other procedures before turning off the power.
2. Stop all I/O activity to the enclosure.
If applicable, use TPSSM to logically disconnect the enclosure from the host. Make
sure that all the drive activity indicators on the front of the enclosure are not
blinking (indicating I/O activity) and that the fast write cache indicator light on the
applicable RAID controller is off (not blinking).
3. Make sure that all the enclosure fault indicators are off (see Figure 3-2 on page 35
and Figure 3-3 on page 37).
If a fault indicator is on, correct the problem before turning off the power. Use
TPSSM to diagnose and fix the problem.
Warning:
To shut off all power to an enclosure, you must turn off both power
switches and disconnect both power cords. An enclosure has two power switches
and two power cords. The enclosure continues to operate if both switches are not
turned off and both cords are not disconnected.
4. Turn off both power switches on the rear of the enclosure or the main circuit breaker,
whichever is applicable (see Figure 3-1 on page 28).
Important: Once the power is off, you must wait at least 30 seconds before you turn
it back on again.
5. After you have performed the necessary maintenance procedure, power on the
enclosure using the procedure in “Turning the Power On” on page 27.