IBM Partner Pavilion DS4100 manual Performing an emergency shutdown

Attention: To avoid damage to the hardware, take special care when you restart the system after an unexpected shutdown.

If the storage server shuts down unexpectedly, go to “Restoring power after an over-temperature shutdown.” Otherwise, go to “Restoring power after an emergency shutdown.”

Note: Unattended restoration of power is supported; however, if power restoration is attended, you should follow the best practices guidelines and the power restoration sequence in “Turning on the storage server” on page 66.

Performing an emergency shutdown

Attention: Emergency situations might include fire, flood, extreme weather conditions, or other hazardous circumstances. 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 storage server loses power unexpectedly, it might be due to a hardware failure in the power system or midplane (see Chapter 6, “Hardware maintenance,” on page 111).

Use this procedure to shut down the storage server during an emergency:

1.If you have time, stop all I/O activity to the storage server by shutting down the host or disconnecting the storage server logical drives through the host.

2.Check the LEDs (front and back). Make note of any Fault LEDs that are on so you can correct the problem when you turn on the power again.

3.Turn off all power-supply switches; then unplug the power cords from the storage server.

Restoring power after an emergency shutdown

Use this procedure to restart the storage server if you turned off the power-supply switches during an emergency shutdown, or if a power failure or a power outage occurred:

1.After the emergency situation is over or power is restored, check the storage server for damage. If there is no visible damage, continue with step 2; otherwise, have your system serviced.

2.After you have checked for damage, ensure that the power-supply switches are off; then plug in the storage-server power cords.

3.Complete step 2 on page 66 to determine the proper power-on sequence for your system.

4.Complete steps 3 and 4 on page 66 to turn on power to the devices in your system and to check the status of the storage server.

Restoring power after an over-temperature shutdown

Use this procedure to restart the storage server after an unexpected shutdown due to an over-temperature condition:

1.Make sure that the power-supply switches on the back of the storage server are turned off.

2.Do whatever is necessary to cool the unit (replace the fans, use external fans to cool the room, and so on).

3.Check all components and cables for visible damage. Do not start the storage server if you find evidence of damage.

Chapter 4. Operating the storage server 69