2Replacing SC100/SC120 ComponentsThis section describes how to remove and install components of an SC100/SC120 expansion enclosure.This document assumes that the customer has received the replacement component and is ready toinstall it.Safety PrecautionsAlways follow these safety precautions to avoid injury and damage to Storage Center equipment.If equipment described in the document is used in a manner not specified by Dell, the protectionprovided by the equipment may be impaired. For your safety and protection, observe the rules describedin the following sections.NOTE: See the safety and regulatory information that shipped with each Storage Centercomponent. Warranty information may be included within this document or as a separatedocument.Installation Safety PrecautionsFollow these safety precautions:• Dell recommends that only individuals with rack-mounting experience install an SC100/SC120expansion enclosure in a rack.• Make sure the expansion enclosure is fully grounded at all times to prevent damage from electrostaticdischarge.• When handling the expansion enclosure hardware, you should use an electrostatic wrist guard (notincluded) or a similar form of protection.The expansion enclosure chassis MUST be mounted in a rack; the following safety requirements must beconsidered when doing so:• The rack construction must be capable of supporting the total weight of the installed chassis and thedesign should incorporate stabilizing features suitable to prevent the rack tipping or being pushedover during installation or in normal use.• To avoid danger of the rack toppling over, do not slide more than one chassis out of the rack at atime.• The rack design should take into consideration the maximum operating ambient temperature for theunit, which is 40°C.Replacing SC100/SC120 Components 11