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Attention:
Except in an emergency, never turn off the power if any Needs
Attention LEDs are on. Correct the fault before you turn off the power. Use the
DS4000 Storage Manager client and the Needs Attention LEDs to check the overall
status of the DS4200 Express. All LEDs should be green on the front of the storage
subsystem. If they are not, use the DS4000 Storage Manager client to diagnose the
problem. This ensures that the DS4200 Express will power up correctly later.
The DS4200 Express is designed to run continuously. After you turn on the DS4200
Express, do not turn it off. Turn off the power only in the following situations:
v Instructions in a hardware or software procedure require that you turn off the
power.
v An IBM technical support representative instructs you to turn off the power.
v A power outage or emergency situation occurs, see "Restoring power after an
unexpected shutdown" on page 97.
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
Attention:
Turning off and turning on power without waiting for the storage
subsystem disk drives to spin down can damage the drives and might cause data
loss. Always let at least 70 seconds elapse from when you turn off the power until
you turn on the power again.
Chapter 4. Operating the storage subsystem
95
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