IBM DS3500 Installation, User & Maintenance Manual page 131

d. If applicable, use the operating-system software to disconnect the storage
subsystem logical drives from the host before you power-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 6 for the correct shutdown sequence.
6. 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 a 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 enclosures. Turn off both power-supply switches on the rear of
the storage subsystem.
c. Turn off power to other supporting devices (for example, management
stations or Ethernet switches).
7. Use the procedures in "Replacing a hot-swap hard disk drive" on page 108 to
remove the drives that you want to replace. Use the procedures in "Installing a
hard disk drive" on page 106 to install the new drives in the storage
subsystem.
8. After you install all the new drives, check the system documentation for the
hardware devices that you intend to power-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 enclosures before the storage subsystem. The
controllers might not recognize the correct configuration if the drives are
powered-on after the storage subsystem. For instructions for powering-on
the storage subsystem, see the storage subsystem documentation.
c. Turn on the power to the storage subsystem; then, restart or turn on the
power to the host.
9. Turn on the power to each device, according to the power-on sequence in step
8. To turn on power to the storage subsystem and the expansion enclosures,
turn on the power-supply switches on the rear of the storage subsystem. You
must turn on both power-supply switches to take advantage of the redundant
power supplies.
10. Check the green drive activity LEDs and the amber drive fault LEDs above the
new drives.
Make sure that the drive activity LEDs are lit and the drive fault LEDs are off.
Note: The drive fault LEDs might flash intermittently while the drives spin up.
v If a drive activity LED is off, the drive might not be installed correctly.
Remove the drive, wait 70 seconds, and then reinstall it.
v If the drive fault LED stays lit or the drive activity LED stays off, the new
drive might be faulty. See the Storage Manager software for problem
determination.
11. Use the DS Storage Manager software to configure the new drives. See the
DS Storage Manager software online help for detailed instructions.
Chapter 5. Replacing components
111