Removing an emm or scsi terminator card – Dell PowerVault 221S (SCSI) User Manual

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Removing and Installing EMMs and the SCSI Terminator Card: Dell PowerVault 220S and 221S Systems Installation and Troubleshooting Guide

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Removing and Installing EMMs and the SCSI Terminator

Card

Dell™ PowerVault™ 220S and 221S Systems Installation and Troubleshooting Guide

A system with redundant enclosure management features two EMMs that are designated as primary and secondary and can

be configured in either a cluster or joined-bus mode. A system with nonredundant enclosure management consists of one

EMM and one SCSI terminator card configured in a joined-bus mode, or two EMMs configured in a split-bus mode. In

redundant EMM systems, only one EMM per SCSI bus is active at one time, so only one EMM per SCSI bus can respond to

SCSI commands from an initiator.

EMMs and the SCSI terminator card are "warm-pluggable" and can be removed and installed without shutting down the

storage system, provided all I/O to the module has ceased.

This section describes how to remove and install EMMs and the SCSI terminator card in your storage system.

NOTE:

In a joined-bus or cluster configuration, you must turn off any server nodes connected to the storage system

while you replace an EMM.

NOTICE:

To prevent damage to your storage system, you should wear a wrist grounding strap while performing the

following procedures. See your Product Information document for safety information.

Removing an EMM or SCSI Terminator Card

1. Turn off the storage system.

This step is optional if I/O activity to the device has ceased.

2. Using a #2 Phillips-head screwdriver, loosen the captive screw at the top of the EMM or SCSI terminator card (see

3. Grasp the handle of the module and pull it from the module slot.

NOTE:

If you did not turn off power to the storage system in step 1, after the module is removed from the system, the

amber shelf fault light is illuminated until the module is replaced.

Figure 4-1. Removing and Installing an EMM or SCSI Terminator Card

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