Performing An Emergency Shutdown; Restoring Power After An Emergency Shutdown; Restoring Power After An Overtemperature Shutdown - IBM TotalStorage DS300 Hardware Installation And User's Manual

If the storage subsystem shuts down unexpectedly but there is still power to the
site, use the ServeRAID Manager program to determine whether the storage
subsystem has overheated.
v If an overtemperature condition is indicated, use the procedure in "Restoring
v If the storage subsystem has shut down because of a power failure or an

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 the equipment from potential damage due to electrical
surges when power is restored. If the storage subsystem loses power unexpectedly,
it might be due to a hardware failure in the power system or midplane. For more
information, see the DS300 or DS400 Problem Determination Guide.
To shut down the storage subsystem during an emergency, complete the following
steps:
1. If you have time, stop all I/O activity to the storage subsystem by shutting down
2. Check the LEDs (front and back). Make note of any fault LEDs that are lit so
3. Turn off all power-supply switches; then, disconnect the power cords from the

Restoring power after an emergency shutdown

To restart the storage subsystem if you turned off the power-supply switches during
an emergency shutdown, or if a power failure or a power outage occurred, complete
the following steps:
1. After the emergency situation or when power is restored, check the storage
2. After you have checked for damage, make sure that the power-supply switches
3. Determine the correct power-on sequence for the system using step 2 on page
4. Complete steps 3 on page 51 and 4 on page 52 to turn on power to the devices

Restoring power after an overtemperature shutdown

To restart the storage subsystem after an unexpected shutdown due to of an
overtemperature condition, complete the following steps:
1. Make sure that the power-supply switches on the back of the storage
2. Do whatever is necessary to cool the unit (replace the power supplies, use
3. Check all components and cables for visible damage. Do not start the storage
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Hardware Installation and User's Guide
power after an overtemperature shutdown" to restart the storage subsystem.
emergency shutdown, use the procedure in "Performing an emergency
shutdown" to restart the storage subsystem.
Emergency situations might include fire, flood, extreme weather
the host or disconnecting the storage subsystem logical drives through the host.
that you can correct the problem when you turn on the power again.
storage subsystem.
subsystem for damage. If there is no visible damage, continue with step 2;
otherwise, have the system serviced.
are off; then, connect the power cords to the storage subsystem.
51.
in the system and to check the status of the storage subsystem.
subsystem are turned off.
external fans to cool the room, and so on).
subsystem if you find evidence of damage.