Step 5. Setting Up Rails In The Rack - IBM RS/6000 Enterprise Server M80 Installation Manual

Step 5. Setting Up Rails in the Rack

If your system arrived installed in a rack with all the cables attached, skip to "Step 8.
Setting Up Attached Devices" on page 24. If not, continue with this step.
Note: Read the following drawer-placement notes and caution statements before
Note: Service clearance may be required on the early model I/O drawers. Refer to the
Notes:
1. The 7014 Model T00 and T42 racks have EIA numbers visible from the front and
rear that start with 1 (at the bottom) to 36 or 42 (at the top). Therefore, the rail
surface on which a drawer sits is approximately in line with the lower edge of the
EIA position for that drawer. The lowest EIA number completely occupied by a
drawer is said to be that drawer's EIA position . An EIA number is also used in
identifying cables attached to that drawer. The CEC drawer occupies 8 EIA units,
and the I/O drawers occupy 5 EIA units each.
2. The I/O drawers have two service positions. One position is with the drawer pulled
out the front of the rack, and the other position is with the drawer pulled out the rear
of the rack.
3. Two stabilizers are required on the rack before installing the system if the rack is
not bolted to the floor. One stabilizer must be installed at the bottom front of the
rack unit, and the other at the bottom rear of the rack unit. Both stabilizers must be
installed prior to servicing the system.
4. If the system is the only system in the rack, follow these placement guidelines:
v 7014 T42 rack: Start from the bottom, or center the drawers at about the 17th
v 7014 T00 rack: Start from the bottom, or mount rails so that the top drawer does
v 7014 S00 rack: This rack has no specific placement guidelines.
5. Some I/O drawers require 4 EIA units service clearance from the top of the rack
when placed in their rear service position. These early drawers have a rear service
stop latch 11.25 inches (285.75 mm) from the rack mounting flange at the front of
the drawer. The current drawers have a rear service stop latch 5.75 inches from the
rack-mounting flange at the front of the drawer and do not have this service
clearance requirement.
6. If there are no drawers placed immediately above the I/O drawers, install drawer
anti-tip guides as shown in the rack drawer rail instructions shipped with the system.
This will help support the I/O drawers when they are placed in their rear service
position.
6
Installation Guide
installing the system rails.
following notes for specific instructions.
EIA location.
not exceed the 32nd EIA location.
Note: In order to address concurrent serviceability issues on racks with multiple
systems installed, it is suggested that the 1st EIA unit be left vacant to
allow the bottom drawer room to pass over the cables when the drawer is
moved into the rear service position.