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Preparing the rack cabinet
Important: Before you install the storage subsystem in a rack cabinet, keep in mind
the following considerations:
v Review the documentation that comes with your rack enclosure for safety and
cabling considerations.
v Install the storage subsystem in a recommended 22° C (72° F) environment. See
“Environmental requirements and specifications” on page 24 for details.
v To ensure proper airflow, do not block the air vents; ensure at least 15 cm (6 in.)
of air space.
v To ensure rack stability, load the rack starting at the bottom.
v If you install multiple components in the rack, do not overload the power outlets.
v Always connect the storage subsystem to a properly grounded outlet.
v Always connect the IBM-certified rack power distribution units (PDUs) to at least
two independent power circuits or sources.
Complete the following steps to prepare the rack cabinet before you install the
storage subsystem:
1. Move, unpack, and level the rack at the installation site (if needed).
2. Remove the external rack panels.
3. If necessary, stop all I/O activity to the devices in the rack.
4. If necessary, turn off all drive enclosure and rack power. Disconnect existing
power, network, and other external cables.
5. Install any additional interface cables and power cables.
After you have completed these steps, continue with “Installing the support rails.”
Installing the support rails
Attention: Duplicate copies of the rack mounting templates are provided in
Appendix B, “Rack mounting template,” on page 195. If you want to tear out the
templates from this document for easier use, use the copies in Appendix B, “Rack
mounting template,” on page 195 rather than the copies provided in this section.
Use the following templates (Figure 18 on page 37 and Figure 19 on page 38) to
identify the proper locations for inserting M5 screws when mounting the support
rails and DS4700 Express Storage Subsystem to a rack cabinet. The locations for
the M5 screws are highlighted in the templates.
Hold the appropriate template up to each side of the rack cabinet at the 3-U section
where you will install the DS4700 Express. U boundaries are shown as horizontal
dashed lines in the rack mounting templates. The highlighted squares on each side
of the template mark the positions where you will thread the M5 screws that secure
the rails and the DS4700 Express to the front and rear of the cabinet.
Note: The mounting holes that are shown in the following templates are square.
The holes in your rack might be round, square, or threaded.
36 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide