IBM TotalStorage DS300 Hardware Installation And User's Manual page 52

Statement 5
Complete the following steps to turn off the power:
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.
4. From the ServeRAID Manager interface, shut down the RAID controller to flush
5. If applicable, use the operating-system software to disconnect the storage
6. Turn off the power to each device according to the following shutdown
After you perform the necessary maintenance procedures, turn on the power by
using the procedure in "Turning on the storage subsystem" on page 36.
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IBM TotalStorage DS300 and DS400: Hardware Installation and User's Guide
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:
v All of the green drive-active LEDs on the front of the storage subsystem (and
on all attached expansion units) are not flashing.
v The green cache-active LEDs on the back of the storage subsystem are off.
the data from the cache.
subsystem logical drives from the host before the storage subsystem is turned
off.
Attention: To turn off all power to the storage subsystem, you must turn off
both power-supply switches and disconnect both power cords. Use the
procedure in step 6 for the proper shutdown sequence.
sequence:
a. Turn off power to the host before the storage subsystem. If the host must
stay powered on to support an existing network, see the operating system
documentation for information about disconnecting the storage subsystem
logical drives from the host before the storage subsystem is powered off.
b. Turn off power to the storage subsystem before you turn off power to the
expansion units. Turn off both power-supply switches on the back of the
storage subsystem.
c. Turn off power to other supporting devices, such as management stations,
Fibre Channel switches, Fibre Channel managed hubs, or Ethernet switches.
Note: You do not have to perform this step if you are servicing only the
storage subsystem.