SC180 Replacing an Enclosure Management Module (EMM)

Summary: SC180 Replacing an Enclosure Management Module (EMM)

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Symptoms

The SC180 expansion enclosures support redundant hot-swappable Enclosure Management Modules (EMMs).
EMMs provide the following data path and enclosure management functions for the expansion enclosure:
  • Monitoring and controlling expansion enclosure environment elements such as temperature, fan, power supplies, and expansion enclosure LEDs
  • Controlling access to hard drives
  • Communicating expansion enclosure attributes and states to Storage Center

Table of Content

  1. Identifying the Failed Enclosure Management Module
  2. Replacing an Enclosure Management Module

Identifying the Failed Enclosure Management Module

To determine which EMM failed, use the Dell Storage Client.
  1. Click the Hardware tab.
  2. In the Hardware tab navigation pane, select the Storage Center.
  3. In the Hardware Alerts area, find the hardware alert that identifies the enclosure with the failed EMM (IO Module).
    SLN299405_en_US__1SC180 rep emm1
    Figure 1: Hardware Alert Identifying the Enclosure with the Failed EMM
     
  4. In the Hardware tab navigation pane, expand the enclosure identified in the previous step.
  5. Select I/O Modules. The status of each EMM is displayed in the I/O Modules tab.
  6. Select the failed EMM to the display its location in the I/O Module View tab.
    SLN299405_en_US__2SC180 rep emm2
    Figure 2: Rear View of the Enclosure Showing the Failed EMM
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Replacing an Enclosure Management Module

Use this procedure to replace a failed EMMs.

Prerequisites

  1. Use SupportAssist to send diagnostic data to Dell Technical Support Services.

About this task

EMMs can be replaced one at a time without shutting down the storage system.

Steps

  1. Disconnect the SAS cables connected to the EMM.
    NOTE: Make sure all of the cables are labeled before disconnecting them from the EMM.
  2. Push the release tab to the right and pull the release lever away from the chassis.
  3. Grasp the release lever and pull the EMM away from the chassis.
    SLN299405_en_US__3SC180 rep emm3
    Figure 3: Replacing an EMM
    1. EMM
    2. EMM release tab and lever
     
  4. Insert the replacement EMM into the bay until it is fully seated.
  5. Push the release lever toward the chassis until it clicks into place.
  6. Reconnect the SAS cables to the EMM.

Next steps

  1. Use SupportAssist to send diagnostic data to Dell Technical Support Services.
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Cause

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Resolution

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Affected Products

Dell Storage SC180
Article Properties
Article Number: 000141402
Article Type: Solution
Last Modified: 29 Jul 2025
Version:  5
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