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4. Continue to push rmly until the handle fully engages. The camming foot on the carrier will engage into

a slot in the enclosure. You should hear a click as the latch handle engages and holds the handle

closed.

Figure 39. Installing a drive carrier module (2 of 2)

5. Verify that the amber Fault LED on the disk module handle is off. Verify that the front panel LED states

show no amber module faults. The enclosure front panel Drive Activity blue LED will blink to show disk

activity.

Replacing an IOM

Procedures for the removal and installation of an I/O Module.

Overview

Important: The IOM must be installed in IOM slot No.0. As you face the enclosure rear panel, this is the

IOM slot located on the right. An IOM blank must be installed in the adjacent slot (Slot 1) as shown in the

rear panel module slot index diagram. This conguration is required to ensure sufcient air flow through

the enclosure during operation.

The I/O module (IOM) denotes a controller module.

You may need to replace an expansion module when:

• The Fault LED is illuminated.

• Logs or events in the rmware indicate a problem with the module.

• Troubleshooting indicates a problem with the module.

Before you begin

Removing an IOM or IOM blank module from an operational enclosure signicantly changes air flow

within the enclosure. Openings must be populated for the enclosure to cool properly. Leave modules in

the enclosure until ready to install a replacement. If replacing both IOMs in a dual-canister enclosure,

record conguration settings before installing the new controller modules. See “Removing the IOM” on

page 67, and “Installing the IOM” on page 68 for instructions about installing an additional controller

module.

Verifying component failure

• Check Module Fault LED – rear (front of enclosure): Amber = Fault condition.

• Check Fault LED (back of enclosure on IOM face plate): Amber = Fault condition.

IBM Cloud Object Storage System: Medium/Large J11/J12 Disk Enclosure Hardware Installation and

Maintenance Manual

IBM Medium J11 User Manual

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