IBM DS3500

v A power outage or emergency situation occurs. See “Turning off the expansion
enclosure in an emergency.”
To turn off the expansion enclosure, complete the following steps:
1. Make sure that all amber status or fault LEDs are off. If any status or fault LEDs
are lit (on hard disk drives, power supplies, or ESMs), identify or correct the
problems before you turn off the power. For more information, see Chapter 6,
“Solving problems,” on page 127.
2. On the server to which the expansion enclosure is connected, either directly or
through another supported device that contains a RAID controller, close all
operating-system windows and programs; then, shut down the server.
3. Shut down any device that contains a RAID controller to which the expansion
enclosure is connected.
4. Turn off both EXP3500 expansion enclosure power supplies.
Turning off the expansion enclosure in an emergency
Attention: If a power outage or emergency situation occurs, always turn off all
power switches on all computing equipment. This will help safeguard your
equipment from potential damage due to electrical surges when power is restored.
If the expansion enclosure loses power unexpectedly, it might be due to a hardware
failure in the power system or midplane. See Chapter 6, “Solving problems,” on
page 127.
To turn off the expansion enclosure during an emergency situation, complete the
following steps:
1. If you have time, stop all activity and check the LEDs (front and rear). Make
note of any status or fault LEDs that are lit so that you can correct the problem
when you turn on the power again.
Note: See the documentation that comes with your RAID controller for
information about correcting the problem.
2. On the server to which the expansion enclosure is connected, either directly or
through another supported device that contains a RAID controller, close all
operating-system windows and programs; then, shut down the server.
3. Shut down any device that contains a RAID controller to which the expansion
enclosure is connected.
4. Turn off both power supplies; then, disconnect the power cables.
Turning on the expansion enclosure after an emergency
To restart the expansion enclosure if you turned off the power supplies during an
emergency shutdown, or if a power failure or a power outage occurred, complete
the following steps:
1. After the emergency situation is over or power is restored, check the expansion
enclosure for damage. If there is no visible damage, continue with step 2;
otherwise, have your unit serviced.
2. Check the system documentation for the hardware devices that you intend to
turn on, and determine the correct power-on sequence.
Note: Be sure to turn on the expansion enclosure before or at the same time
you turn on the device that contains the RAID controller to which the
expansion enclosure is connected.
90 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide