IBM 520Q User Manual

Chapter 2. Architecture and technical overview 

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:

This requires a shutdown of the system, before the task can be 
performed, for example, installing additional processors contained 
in the second processor book.

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.

Terra-cotta takes precedence over this color combination, and the 
rules for a terra-cotta only touch point apply.

The 

 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.

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.