IBM DCS3860, Инструкция по установке, использованию и обслуживанию

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Recovering from an overheated power supply
Each storage enclosure contains two power supplies. Each power supply contains a
built-in temperature sensor to prevent the power supply from overheating. Under
normal operating conditions, with an ambient air temperature range of 10°C to
40°C (50°F to 104°F), the fans in the power supplies maintain a suitable operating
temperature inside the module.
If the internal temperature reaches 65°C (149°F), the power supply shuts down
automatically. If both power supplies shut down because of overheating, the
storage system has no power, and all LEDs are off.
The following factors can cause the power supplies to overheat:
v
An unusually high room temperature
v
Fan failures in the power supplies
v
Defective circuitry in a power supply
v
Blocked air vents
v
Failures in other devices in the configuration or rack
If a fan failure causes overheating, the system-error LED and overtemperature
LEDs on the front bezel are lit. The fault LED on the power supply might also be
lit.“Checking the LEDs” on page 61 shows the location of the LEDs on the
DCS3860.
If the storage system temperature exceeds 45°C (113°F), the IBM DS Storage
Manager displays a Needs Attention icon in the Subsystem Management window.
If the air temperature inside the rack 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.
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 storage system shuts down, and the
storage management software displays a Not Responding status in the
Subsystem Management window.
Attention: To prevent damage to the storage system components when the
power supplies automatically shut down, immediately remove all rack panels to
help reduce the rack air temperature.
Complete the following steps to resume normal operation after a power-supply
shutdown:
1. Confirm whether you used the procedure in “Troubleshooting the storage
system” on page 60 to ensure that the power supplies have shut down
because of an overheating problem.
2. Stop I/O activity to the storage system and all attached expansion enclosures.
3. Take all or some of the following measures to alleviate the overheating
problem:
v
Remove all panels from the rack immediately.
v
Use external fans to cool the area.
v
Shut down the power to the storage enclosure, using the procedure that is
described in “Performing an emergency shutdown” on page 72.
4. Wait for the air in and around the storage system to cool.
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide