Turning Off The Storage Subsystem - IBM TotalStorage DS300 Hardware Installation And User's Manual

2. Check the system documentation for the hardware devices that you intend to
3. Turn on the power to each device, according to the power-on sequence in step
4. Use the ServeRAID Manager program and the fault LEDs to check the overall

Turning off the storage subsystem

Attention:
subsystem fault LEDs are lit. Correct the fault before you turn off the power by
using the proper troubleshooting or servicing procedure. This ensures that the
storage subsystem will power up correctly later. For more information, see the
DS300 or DS400 Problem Determination Guide.
The storage subsystem is designed to run continuously, 24 hours a day. After you
turn on the storage subsystem, do not turn it off. Turn off the power only when:
v Instructions in a hardware or software procedure require you to turn off the
v A service technician tells you to turn off the power.
v A power outage or emergency situation occurs (see "Performing an emergency
Statement 5
CAUTION:
The power control button on the device and 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.
turn on, and then determine the proper startup sequence. Use the following
power-on sequence, where applicable:
a. Turn on the power to the supporting devices (for example, Ethernet
switches, Fibre Channel switches, and management stations) before the
storage subsystem.
b. Turn on the expansion units before the storage subsystem. The controllers
might not recognize the correct configuration if the drives are powered up
after the storage subsystem. For instructions for turning on the expansion
units, see the expansion-unit documentation.
c. Turn on the power to the storage subsystem
d. Restart or turn on the power to the host.
2. To turn on power to the storage subsystem, turn on the power-supply
switches on the back of the storage subsystem. You must turn on both
power-supply switches to take advantage of the redundant power supplies.
status of the storage subsystem and its components. All LEDs should be green
on the front of the storage subsystem. If they are not, use the ServeRAID
Manager program to diagnose the problem (see "Monitoring status through
software" on page 40).
Note: The green drive-active LED and amber drive-fault LED below each drive
might flash intermittently as the drive spins up. Wait until the storage subsystem
is finished powering up before checking the LEDs on the front of the storage
subsystem. For more information, see "Front view" on page 29.
Except in an emergency, never turn off the power if any storage
power.
shutdown" on page 39).
Chapter 4. Storage subsystem controls, LEDs, and power
37