- IBM switch Users and Maintenance Guide

Removing the CRUs
Attention: This section describes how to remove the CRUs in order to minimize
the weight of the DS4100 before you install it in the rack cabinet. However, if you
have three or more people available to lift and install the DS4100 in a rack cabinet,
you might not find it necessary to remove the CRUs before you install the DS4100.
If this is the case, you can skip the CRU removal instructions provided in this
section. Instead, continue with “Installing the DS4100 into a rack cabinet” on page
28, and then skip the CRU replacement instructions provided in “Replacing the
DS4100 CRUs” on page 29.
Use the following procedures to remove the CRUs from the DS4100 before
installation. Use these instructions after you have completed all applicable site, rack
cabinet, and DS4100 preparations (as discussed in “Preparing for installation” on
page 18) and installed the support rails (as discussed in “Installing the support rails”
on page 22). Alternately, if necessary, you can use these instructions to lighten the
DS4100 before removing it from the shipping box. The shipping box opens to
provide access to the storage server CRUs.
The DS4100 comes with a rack-mounting hardware kit for installing it in a rack
cabinet. It is easier to lift the DS4100 and install it in a rack cabinet if you remove
all the CRUs first. You will need an antistatic wrist strap and a cart or level surface
(to hold the CRUs). Observe the precautions listed in “Handling static-sensitive
devices” on page 18. In the following procedure, you will remove the following
CRUs from the storage server before you install it in the rack cabinet:
v RAID controllers
v Power supplies
v Fans
v Hot-swap hard disk drives
You
do not need to remove the blank trays.
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: The storage server comes with a bezel that is attached to the front of
the unit. The bezel protects the light pipes that are located above the drive trays.
Leave the protective bezel in place until you are instructed to remove it.
Removing a RAID controller
Complete the following steps to remove a RAID controller:
Chapter 2. Installing the storage server 25