Owners Manual

module can be removed from a powered-on enclosure for a maximum period of five minutes. Beyond that time, the
enclosure may automatically shut down to prevent damage.
2. Reseat the power supply by removing and reinstalling it. See AC power supply unit or cooling fan module.
NOTE: After installing a PSUs, allow several seconds for the enclosure to recognize the PSUs and to determine if it is
working properly.
If the problem is not resolved, see Getting Help.
3. If all LEDs on the PSUs or cooling fan module are off and if the enclosure is powered on, you must update the firmware. For
information about updating the firmware, see Dell Update Package at dell.com/support.
Troubleshooting enclosure cooling problems
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that came with the product.
Ensure that none of the following conditions exist:
• Enclosure cover or hard disk drive blank is removed.
• Ambient temperature is too high. See Technical specifications.
• External airflow is obstructed.
• The power supply unit or cooling fan module is removed or has failed. See Troubleshooting power supply unit or cooling fan module.
If the problem is not resolved, see Getting Help.
Troubleshooting Enclosure Management Modules
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that came with the product.
CAUTION: It is recommended that you turn off the host server before turning off the enclosure to prevent loss of data.
• If the EMM status LED is solid or blinking amber (2 or 4 times per sequence):
• Turn off the server.
• Remove the EMM and verify that the pins on backplane and EMM are not bent. See Removing an EMM.
• Reinstall the EMM and wait for 30 seconds. See Installing an EMM.
• Turn on the server.
• Check the EMM status LED.
• If EMM status LED is blinking amber (5 times per sequence), update the firmware to the latest supported firmware on both the
EMMs. For more information about downloading the latest firmware, see Dell Update Package at dell.com/support.
• If the link status LEDs are not green:
• Turn off the server.
• Reseat the cables on the storage enclosure and the server.
• Restart the storage enclosure and wait until enclosure is fully booted.
• Turn on the server.
• Check the link status LED. If the link status LED is not green, proceed to the next step.
If the problem is not resolved, see Getting Help.
Troubleshooting hard disk drives
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
Troubleshooting your enclosure 29