Chapter 5: Troubleshooting; Troubleshooting Startup Failures; Troubleshooting The Power Supply Unit; Troubleshooting The Emm - Dell PowerVault MD2412 Owner's Manual

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This section provides information about troubleshooting your system.
CAUTION:
Many repairs may only be done by a Dell certified service technician. You should only perform
troubleshooting and simple repairs as authorized in this manual or as directed by Dell technical support.
Damage due to servicing not authorized by Dell is not covered by your warranty. Read and follow all the safety
instructions before troubleshooting your system or replacing any parts.
Before troubleshooting your system, ensure that all cables are connected to the correct ports and that the cables are securely
attached.

Troubleshooting startup failures

Check for the following if the enclosure fails to start up:
● Check the LED status indicators and ensure that all the enclosure components are working properly. See
● Check for error messages in your system manager.
● Ensure that you do not hear any scraping or grinding sound from the hard drives.
● If the problem persists, see

Troubleshooting the power supply unit

The power supply unit (PSU) is hot-swappable. Leave the enclosure powered on when replacing a power supply.
NOTE:
Always comply with all electrostatic and thermal guidelines to prevent bodily injury and to ensure that the system
functions properly when performing hot-plug operations.
CAUTION:
The enclosure can operate on a single power supply; however, both modules must be installed to
ensure proper cooling.
1. Ensure that nothing is blocking the airflow through the PSU or the enclosure.
2. Reseat the power supply by removing and reinstalling it. See
3. Check the power cable and the power source into which the power supply is plugged.
4. Connect another device to the power source to verify that the power source is working.
5. Connect the cable to a different power source.
6. Replace the power cable.
7. If the problem is not resolved, swap or replace the PSU with a known good PSU.
8. If the problem persists, see
After installing a PSU, allow several seconds for the enclosure to recognize the PSU and to determine if it is working properly.

Troubleshooting the EMM

The EMM is hot-swappable. Leave the enclosure powered on when replacing an EMM.
NOTE:
Always comply with all electrostatic and thermal guidelines to prevent bodily injury and to ensure that the system
functions properly when performing hot-plug operations.
1. Ensure that the EMM is running the current firmware version. If not, Go to dell.com/support, download the latest firmware
version, and update the firmware on both EMMs.
2. Remove the EMM and verify that the pins on the backplane and canister are not bent. See
3. Ensure that nothing is blocking the airflow through the EMM.
18
Troubleshooting
Getting
help.
Getting
help.
Troubleshooting
Power supply unit
replacement.
Front panel
LEDs.
Replacing the
EMM.
5

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