If the module temperature exceeds 45° C (113° F), the storage management
software displays a Needs Attention icon in the Subsystem Management window. If
event monitoring is enabled, and event notification is configured, the software
issues the following two critical problem notifications:
v
If
one
power supply shuts down, the storage management software displays a
Needs Attention status in the Subsystem Management window.
v
If
both
power supplies shut down, the module shuts down, and the storage
management software displays a Not Responding status in the Array
Management window.
Use the following procedure to resume normal operation after a power supply
shutdown.
Attention:
Risk of damage from overheating
- The power supplies
automatically shut down when the air temperature inside the cabinet reaches 68°
C (154° F). If the power supplies shut down, immediately remove all cabinet
panels to help cool the cabinet air temperature and to prevent damage to the
DS4000 storage subsystem configuration components.
1. Remove the front cover.
2. If applicable, mute the alarm.
3. Did you use the procedure “Troubleshooting the storage subsystem ” on page
124 to identify an overheating problem?
v
Yes
- Go to step 4.
v
No
- Perform the procedure “Troubleshooting the storage subsystem ” on
page 124 to verify that the power supplies have shut down because of an
overheating problem, and then go to step 4.
4. Stop I/O activity to the storage subsystem and all attached storage expansion
enclosures.
5. Take all or some of the following measures to alleviate the overheating
problem:
v
Removing all panels from the cabinet immediately
v
Using external fans to cool the area
v
Shutting down the power to the storage expansion enclosure, using the
procedure described in “Performing an emergency shutdown” on page 136
6. Wait for the air temperature in and around the storage subsystem to cool.
After the temperature inside the power supplies cools to below 65° C (149° F),
the storage subsystem is capable of power-up recovery without operator
intervention. After the air has cooled, the power supplies should turn on
automatically. If the power supplies restart automatically, the controllers will
reset and return to normal operation.
7. Did the power supply and fan units restart automatically?
v
Yes
- Go to step 9 on page 140.
v
No
- Go to step 8.
8. Turn off the power switch on each controller in the storage subsystem, power
off all connected storage expansion enclosures, and flip the disconnected
devices to the OFF position (for models with dc power supply and fan unit
CRUs only). Wait 1 minute and then turn on power to all connected storage
expansion enclosures and flip the disconnected devices to the ON position (for
models with dc power supply and fan unit CRUs only).
Chapter 4. Operating the storage subsystem
139
Summary of Contents for DS4700 EXPRESS
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