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10. Remove (unplug) all of the power cords from the EXP395 power supply
11. After you perform the necessary maintenance procedures, turn on the power
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 helps to safeguard your equipment from potential damage due to electrical
surges when power is restored. If the EXP395 loses power unexpectedly, it might
be due to a hardware failure in the power system or in the midplane of the
EXP395.
Complete the following steps to shut down the system during an emergency:
1. If you have time, stop all I/O activity to the storage expansion enclosure.
2. Check the LEDs. Make note of any Needs Attention LEDs that are on so you
3. Turn off all power supply switches, starting with the DS3950 storage subsystem
Restoring power after an unexpected shutdown
Complete the following steps to restart the EXP395 if you turned off the power
supply switches during an emergency shutdown, or if a power failure or power
outage occurred:
1. After the emergency situation is over or power is restored, check the EXP395
2. After you check the EXP395 for damage, ensure that the power switches are in
3. Check the system documentation of the hardware devices that you want to
60
IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User's, and Maintenance Guide
connectors.
using the procedure in.
can correct the problem when you turn on the power again.
first, and followed by the storage expansion enclosures. Then, unplug the
power cables from the EXP395.
Statement 5:
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.
for damage. If there is no visible damage, continue with step 2. Otherwise,
have your system serviced.
the off position; then plug in the EXP395 power cables, if required.
turn on and determine the proper startup sequence.
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