Dell MD1280 manual Troubleshooting I/O EMMs

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Steps

1.Determine the status of DDIC LED.

a. If the DDIC fault LED glows, it implies that the hard drive has failed.

CAUTION: Confirmed that the particular hard drive contains no user data. The Fault LED alone is not an indication the hard drive can be safely removed.

b. If the DDIC fault LED is not glowing, perform task 2 here.

2.Check the connectors and reseat the DDIC.

CAUTION: This task should be only performed on unmanaged hard drives or after it is confirmed that the particular hard drive contains no user data. Mere glowing of Fault LED does not imply that the hard drive has failed (you can remove the hard drive even if the Fault LED is glowing).

a.Remove the DDIC.

b.Check the DDIC and the backplane to ensure that the connectors are not damaged.

c.Reinstall the DDIC. Ensure the DDIC contacts the backplane.

Troubleshooting I/O EMMs

About this task

To troubleshoot I/O EMMs, complete the following tasks:

Steps

1.Check the pins and reseat the EMM.

a.Remove the EMM.

b.Verify that the pins on the backplane and the EMM are not bent. If any pins are bent, do not attempt to correct them; instead, contact Dell technical support services for further instructions.

c.Reinstall the EMM.

2.Determine the status of the EMM power and Fault LEDs. If the Fault LED glows, it implies that the EMM has failed.

3.Verify link status. If the link status LEDs are not glowing green, check the cables.

a.Reseat the cables on the enclosure and the controller.

b.Recheck the link status LEDs. If the link status LEDs are not glowing green, replace the cables.

4.Reseat the EMM by removing and reinstalling it.

NOTE: Allow the enclosure to identify the EMM and determine its status.

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Contents Dell Storage MD1280 Service Guide Page Contents Technical specifications Contacting Dell Dell Storage MD1280 overview About the Dell Storage MD1280 Service GuideFront-panel features and indicators Dell Storage MD1280 hardwareFront-panel features and indicators Back-panel features and indicators EMM features and indicators Back-panel features and indicatorsFan module features and indicators O EMM features and indicatorsPSU features and indicators Fan module features and indicatorsDdic indicator Ddic indicatorDdic indicator General safety precautions Safety precautionsElectrical safety precautions Replacing Dell Storage MD1280 componentsPre-replacement tasks Replacing PSUsRemoving a PSU Replacing a fan module Replacing fan modulesIdentifying the failed fan module Replacing hard drives Numbering the hard driveIdentifying the failed hard drive Replacing hard drivesOpening a Ddic Ddic Replacing I/O EMM modules Closing a drive drawerIdentifying the failed EMM Replacing an EMMReplacing chassis Replacing rack railsPost-replacement tasks Turning on the EMMs and enclosureTroubleshooting PSUs Troubleshooting Dell Storage MD1280 componentsTroubleshooting fan modules Troubleshooting DDICsTroubleshooting I/O EMMs Technical specifications PSU Physical Depth front mounting bracket to rear surface Page Page Contacting Dell