Performing An Emergency Shutdown; Restoring Power After An Emergency Shutdown; Restoring Power After An Over-Temperature Shutdown - IBM TotalStorage DS4100 Installation, User's, And Maintenance Manual

Attention:
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

Performing an emergency shutdown

Attention:
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
2. Check the LEDs (front and back). Make note of any Fault LEDs that are on so
3. Turn off all power-supply switches; then unplug the power cords from the

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
2. After you have checked for damage, ensure that the power-supply switches are
3. Complete step 2 on page 66 to determine the proper power-on sequence for
4. Complete steps 3 and 4 on page 66 to turn on power to the devices in your

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
2. Do whatever is necessary to cool the unit (replace the fans, use external fans to
3. Check all components and cables for visible damage. Do not start the storage
To avoid damage to the hardware, take special care when you restart
is attended, you should follow the best practices guidelines and the power
restoration sequence in "Turning on the storage server" on page 66.
Emergency situations might include fire, flood, extreme weather
host or disconnecting the storage server logical drives through the host.
you can correct the problem when you turn on the power again.
storage server.
server for damage. If there is no visible damage, continue with step 2;
otherwise, have your system serviced.
off; then plug in the storage-server power cords.
your system.
system and to check the status of the storage server.
turned off.
cool the room, and so on).
server if you find evidence of damage.
Chapter 4. Operating the storage server
69