Troubleshooting Hard Drives; Troubleshooting Usb Devices - Dell PowerEdge M820 Owner's Manual

Troubleshooting Hard 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 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: This troubleshooting procedure can destroy data stored on the hard drive. Before you
proceed, back up all the files on the hard drive, if possible.
1. Run the appropriate controllers test and the hard drive tests in system diagnostics.
If the tests fail, go to step 3.
2. Take the hard drive offline and wait until the hard-drive indicator codes on the drive carrier signal
that the drive may be removed safely, then remove and reseat the drive carrier in the blade.
3. Restart the blade, enter the System Setup and confirm that the drive controller is enabled.
4. Ensure that any required device drivers are installed and are configured correctly.
NOTE: Installing a hard drive into another bay may break the mirror if the mirror state is optimal.
5. Remove the hard drive and install it in the other drive bay.
6. If the problem is resolved, reinstall the hard drive in the original bay.
If the hard drive functions properly in the original bay, the drive carrier could have intermittent
problems. Replace the drive carrier.
7. If the hard drive is the boot drive, ensure that the drive is configured and connected properly.
8. Partition and logically format the hard drive.
9. If possible, restore the files to the drive.
If the problem persists, see

Troubleshooting USB Devices

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.
1. Ensure that the blade is turned on.
2. Check the USB device connection to the blade.
3. Swap the USB device with a known-working USB device.
4. Connect the USB devices to the blade using a powered USB hub.
5. If another blade is installed, connect the USB device to that blade. If the USB device works with a
different blade, the first blade may be faulty. See
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