Performing An Emergency Shutdown; Restoring Power After An Emergency - IBM TotalStorage DS4000 EXP100 Installation, User's, And Maintenance Manual

CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
Complete the following steps to turn off the power:
1. Turn off the power to each device based on the following shutdown sequence:
2. Make sure that all I/O activity has stopped.
3. Make sure that all amber Fault LEDs are off. If any Fault LEDs light (drives,
4. Turn off both power supply switches on the back of the EXP100.

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 helps to safeguard your equipment from potential damage due to electrical
surges when power is restored. If the EXP100 loses power unexpectedly, it might
be due to a hardware failure in the power system or in the midplane of the EXP100.
Complete the following steps to shut down the system during an emergency:
1. Stop all activity and check all of the LEDs. Make a note of any Fault LEDs that
2. Turn off all power supply switches; then, unplug the power cables from the

Restoring power after an emergency

Complete the following steps to restart the EXP100 if you turned off the power
supply switches during an emergency shutdown, or if a power failure or power
outage occurred:
a. Turn off power to the host before you turn off power to the DS4000 storage
subsystem . If the host must stay powered on to support an existing
network, see the operating system documentation for information about
disconnecting the storage subsystem logical drives from the host before the
storage subsystem is powered off.
b. Turn off power to the DS4000 storage subsystem before you turn off power
to the EXP100. Turn off both power supply switches on the back of the
storage subsystem.
c. Turn off power to other supporting devices (for example, management
stations, Fibre Channel switches, or Ethernet switches).
power supplies, or fans), correct the problem before you turn off the power.
Note: Be sure to turn off the EXP100 after or at the same time as you turn off
the DS4000 storage subsystem.
Emergency situations might include fire, flood, extreme weather
are lit so that you can correct the problem when you turn on the power.
EXP100.
Chapter 2. Installing the EXP100
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