Product guide

Chapter 1: System Description QSSC-S4R Server System Product Guide

Version 1.0

If eight fans are present the fans are in a redundant configuration and by definition hot swappable. A redundant

configuration requires two fans per fan zone (See Figure 9). The default four fans of the Value SKU are NOT hot

swappable. To replace the fans during maintenance in a non-hot swappable configuration the system should be

powered down and all power supply disconnected.

The eight hot swap fan modules that are located at the upper front of the chassis can be removed from the

chassis when the chassis cover is removed (See Figure 8).

The fans are docked on the front panel fan board (FPFB).

The S4R fan modules have following features:

 Form factor: 80x80x38mm

 Hot swap blind-mate connector

 Fan presence, PWM, tachometer, and fault signals

 Support Fault LED

 Hard Disk Drive Rotational Vibration Isolation

 Tool-less service at the module level

 Keying feature to prevent incorrect installation

Figure 8. Cooling Fan Locations

Each fan (or pair of redundant fans in series) provides cooling for a zone of the mainboard that includes two

memory riser slots and one CPU socket. Dividers separate the memory risers to allow for proper airflow for each

riser. The zones are designed to be redundant in order to maintain system cooling in the event of fan failure. To

maintain system performance, only one of the eight fans can fail at any one time. See the following figure for a

description of the cooling zones.