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Chapter 2. Architecture and technical overview 67
2.15.1 Touch point colors
Blue (IBM blue) or terra-cotta (orange) on a component indicates a touch point (for electronic
parts) where you can grip the hardware to remove it from or install it into the system, open or
close a latch, and so on. IBM defines the touch point colors as follows:
Blue
This requires a shutdown of the system, before the task can be
performed, for example, installing additional processors contained
in the second processor book.
Terra-cotta The system can remain powered on while this task is performed.
Keep in mind that some tasks might require that you have to
perform other steps first. One example is deconfiguring a physical
volume in the operating system before removing a disk from a
4-pack disk enclosure of the p5-520 and p5-520Q.
Blue and terra-cotta
Terra-cotta takes precedence over this color combination, and the
rules for a terra-cotta only touch point apply.
2.15.2 Securing a rack-mounted system into a rack
The optional rack-mount drawer rail kit is a unique kit designed for use with the rack-mounted
model. No tools are required to install the server or drawer rails into the system rack.
The kit has a modular design that you can adapt to accommodate various rack depth
specifications. The drawer rails are equipped with thumb-releases on the sides, toward the
front of the server, that allow for easy slide out from its rack position for servicing.
2.15.3 Placing a rack-mounted system into a rack
To place the rack-mounted system or expansion unit into the service position:
1. If necessary, open the front rack door.
2. Remove the two thumbscrews (A) that secure the system or expansion unit (B) to the
rack, as shown in the Figure 2-20 on page 68.
Important: It is important to adhere to the touch point colors on the system. Not doing so
can compromise your safety and damage the system.
Note: Always exercise standard safety precautions when installing or removing devices
from racks. By placing the rack-mounted system or expansion unit in the service position,
you can access the inside of the unit.