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Figure 13. Installing the support rails
12. Continue with "Removing the CRUs."
Installing the EXP420
This section provides instructions on installing the EXP420. The installation process
includes:
v "Removing the CRUs"
v "Installing the EXP420 into a rack" on page 30
v "Replacing the EXP420 CRUs" on page 32
Removing the CRUs
This section describes how to remove the CRUs in order to minimize the weight of
the EXP420 before you install it in the rack. However, if you have three or more
people available to lift and install the EXP420 in a rack, you might not find it
necessary to remove the CRUs before you install the EXP420. If this is the case,
you can skip the CRU removal instructions provided in this section. Instead,
continue with "Installing the EXP420 into a rack" on page 30, and then skip the
CRU replacement instructions provided in "Replacing the EXP420 CRUs" on page
32.
Use the following procedures to remove the CRUs from the EXP420 before
installation. Use these instructions after you have completed all applicable site,
rack, and EXP420 preparations (as discussed in "Preparing for installation" on page
21) and installed the support rails (as discussed in "Installing the support rails" on
page 23). Alternately, if necessary, you can use these instructions to lighten the
EXP420 before removing it from the shipping box. The shipping box opens to
provide access to the storage expansion enclosure CRUs.
The EXP420 comes with a rack-mounting hardware kit for installing it in a rack. It is
easier to lift the EXP420 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 20
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IBM System Storage DS4000 EXP420 Storage Expansion Enclosure: Installation, User's and Maintenance Guide
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Rear of Rack
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