IBM DS3200 Storage Subsystem manual Operating the storage subsystem

vAn unusually high room temperature

vFan failures in the power-supply units

vDefective circuitry in a power supply

vBlocked air vents

vFailures in other devices in the configuration or rack cabinet

If a fan failure causes overheating, the system-error LED and overtemperature LEDs on the storage subsystem are lit. The fault LED on the power supply might also be lit. “Checking the LEDs” on page 52 shows the location of the LEDs on the DS3200.

If the storage subsystem temperature exceeds 45°C (113°F), the storage management software displays a Needs Attention icon in the Subsystem Management window. If the air temperature inside the rack cabinet reaches 65°C (149°F), the power supplies automatically shut down. If event monitoring is enabled and event notification is configured, the software issues two critical-problem notifications.

vIf one power supply shuts down, the storage management software displays a Needs Attention status in the Subsystem Management window.

vIf both power supplies shut down, the storage subsystem shuts down, and the storage management software displays a Not Responding status in the Array Management window.

Attention: To prevent damage to the DS3200 storage subsystem components when the power supplies automatically shut down, immediately remove all rack cabinet panels to help reduce the rack cabinet air temperature.

To resume normal operation after a power-supply shutdown, complete the following steps:

1.Did you use the procedure “Troubleshooting the storage subsystem” on page 51 to identify an overheating problem?

v Yes: Go to step 2.

vNo: Perform the procedure in “Troubleshooting the storage subsystem” on page 51 to make sure that the power supplies have shut down because of an overheating problem, and then go to step 2.

2.Stop I/O activity to the storage subsystem and all attached storage expansion enclosures.

3.Take all or some of the following measures to alleviate the overheating problem:

vRemove all panels from the rack cabinet immediately.

vUse external fans to cool the area.

vShut down the power to the storage expansion enclosure, using the procedure that is described in “Performing an emergency shutdown” on page 57.

4.Wait for the air in and around the storage subsystem to cool.

After the temperature inside the power supplies drops to below 65°C (149°F), the storage subsystem is capable of power-on 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.

5.Did the power supplies restart automatically?

vYes: Go to step 8 on page 60.

Chapter 4. Operating the storage subsystem 59