Dell PowerVault 221S (SCSI) - Manual (Page 30)

Troubleshooting: Dell PowerVault 220S and 221S Systems Installation and Troubleshooting Guide
file:///C|/Users/rishi_sood/Desktop/220s/en/it/6f704c51.htm[3/7/2013 12:07:22 PM]
these messages.
Parts Replacement Procedures
This section provides the following procedures for removing and replacing components and assemblies in the storage system:
Removing and installing the split-bus module
Replacing the power supply
Replacing a cooling module
Unless otherwise noted, each procedure assumes the following conditions:
You have read the safety instructions in your Product Information document. Always follow the instructions closely.
While working on the system, do not attempt to service the system except as explained in this guide and elsewhere in
Dell documentation.
You can replace or reinstall a part by performing the removal procedure in reverse order, unless additional information
is provided.
Recommended Tools
Most of the procedures in this section require the use of one or more of the following tools:
# 2 Phillips-head screwdriver
Wrist grounding strap, as explained in the safety instructions found in your Product Information document
Removing and Installing the Split-Bus Module
NOTICE: Always wear a wrist grounding strap when handling equipment with static-sensitive components.
Your storage system comes equipped with a "warm-pluggable" split-bus module which can be removed or replaced with the
system powered on, provided that all I/O activity to the module has ceased. However, since the split-bus module is an
extension of the backplane, it must be present for proper system operation. If you turn on your storage system without a
split-bus module present or the module is removed while the system is powered on, the shelf-fault LED illuminates, and an
audible alarm sounds continuously until a split-bus module is inserted. For more information on split-bus module features and
functions, see " Split-Bus Module ."
This sections describes how to remove and install split-bus modules in your storage system.
Removing a Split-Bus Module
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 split-bus module (see Figure ).
3. Grasp the handle of the module and pull it from the module slot.
Figure 5-4. Removing and Installing a Split -Bus Module