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

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.
To turn off the power, complete the following steps:
1. Before proceeding, use the ServeRAID Manager program to determine the
2. Use the ServeRAID Manager program to check the status of the storage
3. Stop all I/O activity to the storage subsystem and attached expansion units.
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Hardware Installation and User's Guide
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 55).
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 "DS300 storage subsystem front view
LEDs" on page 19 or "DS400 storage subsystem front view" on page 45.
Except in an emergency, never turn off the power if any storage
power.
shutdown" on page 54).
status of the system components and special instructions. The operating-system
software might require you to perform other procedures before you turn off the
power.
subsystem. Correct problems that are reported before you turn off the power.
Make sure that: