IBM totalstorage fastt100, Installation, User And Maintenance Manual, Page: 105 / 160

a. Turn off power to the host before you turn off power to the storage server.
If the host must stay powered on to support an existing network, see the
operating system documentation for information about disconnecting the
storage server logical drives from the host before the storage server is
powered off.
b. Turn off power to the storage server before you turn off power to the
expansion units. Turn off both power supply switches on the back of the
storage server.
c. Turn off power to other supporting devices (for example, management
stations, fibre-channel switches, or Ethernet switches).
Notes:
1) You do not need to perform this step if you are servicing only the
storage server.
2) Depending on your operating system, you might not have to restart the
host. For more information, see the software installation guide for your
operating system.
7. Use the procedures in 5 on page 20 to remove the drives that you want to
replace. Use the procedures in “Installing hot-swap hard disk drives” on page
70 to install the new drives into the storage server.
8. After you install all the new drives, check the system documentation for the
hardware devices that you intend to power up, 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 and management stations) before you turn off power to the
storage server.
b. You must turn on the expansion units before the storage server. The
controllers might not recognize the correct configuration if the drives are
powered up after the storage server. For instructions on powering up the
expansion units, see the expansion-unit documentation.
c. Turn on the power to the storage server; then restart or turn on the power
to the host.
9. Turn on the power to each device, based on the power-on sequence in step 8.
To turn on power to the storage server, turn on the power-supply switches on
the back of the storage server. You must turn on both power-supply switches
to take advantage of the redundant power supplies.
10. Check the green Drive activity LED and the amber Drive fault LED below the
new drive CRUs.
Make sure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the drives spin up.
v
If the Drive activity LED is off, the drive CRU might not be installed correctly.
Remove the drive CRU, wait 30 seconds, and then reinstall it.
v
If the Drive fault LED stays on or the Drive activity LED stays off, the new
drive might be faulty. See the Storage Manager client online Help for
problem determination.
11. Use the Storage Manager client to configure the new drives. See the Storage
Manager client online Help for detailed instructions.
12. Restore the data from backup to all the drives.
Chapter 5. Installing and replacing components
75