IBM TotalStorage DS300 Hardware Installation And User's Manual page 79

Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see "Handling static-sensitive devices" on page 57.
4. Unpack the new drives.
Set the drives on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you have to return the drives.
5. Stop all I/O activity to the storage subsystem and attached expansion units.
Make sure that:
v All of the green drive-activity LEDs on the front of the storage subsystem
(and on all attached expansion units) are not flashing.
v The green cache-active LEDs are off on the front of the RAID controllers.
6. If applicable, use the operating-system software to disconnect the storage
subsystem logical drives from the host before you turn off the storage
subsystem.
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 7 for the correct shutdown sequence.
7. Turn off the power to each device according to the following shutdown
sequence:
a. Turn off power to the host before you turn off power to 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 turned 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, or Ethernet switches.
Note: You do not have to perform this step if you are servicing only the
storage subsystem.
8. Use the procedures in "Replacing a hot-swap hard disk drive" on page 61 to
remove the drives that you want to replace. Use the procedures in "Installing a
hot-swap hard disk drive" on page 60 to install the new drives into the storage
subsystem.
9. After you install all the new drives, check the system documentation for the
hardware devices that you intend to turn on, and then determine the correct
startup sequence. Use the following power-on sequence, where applicable:
a. Turn on the power to the supporting devices (for example, Ethernet
switches and management stations) before you turn off power to 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 turned on
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; then, restart or turn on the
power to the host.
10. Turn on the power to each device, according to the power-on sequence in step
9. 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.
Chapter 10. Installing and replacing components
63