112 IBM eX5 Implementation Guide
Figure 3-29 shows the light path diagnostics panel on the x3850 X5.
Figure 3-29 Light path diagnostics panel on the x3850 X5
Full details about the functionality and operation of the light path diagnostics in this system
are in the IBM System x3850 X5 and x3950 X5 Problem Determination and Service Guide,
which is available at the following website:
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5083418
3.14 Power supplies and fans of the x3850 X5 and MAX5
This section describes the power and cooling features of the x3850 X5 server and the MAX5
memory expansion unit.
3.14.1 x3850 X5 power supplies and fans
The x3850 X5 includes the following power supplies:
One or two dual-rated power supplies are standard (model-dependent; see 3.3, “Models”
on page 64):
– 1975 watts at 220 V ac input
– 875 watts at 110 V ac input
Hot-swappable and redundant at 220 V ac only, with two power supplies
The x3850 X5 includes the following fans to cool system components:
Fan 1 = front left 120 mm (front access)
Fan 2 = front right 120 mm (front access)
Fan 3 = center right 60 mm (two fans) (top access)
Fan 4 = back left 120 mm, part of power supply 2 (rear access)
Fan 5 = back right 120 mm, part of power supply 1 (rear access)
The system is divided into the following cooling zones, which are shown in Figure 3-30 on
page 113. Fans are redundant: two fans per cooling zone.
Zone1 (left) = Fan 1, Fan 4, CPUs 1 and 2, memory cards 1 - 4, and power supply 2
Zone2 (center) = Fan 2, Fan 5, CPUs 3 and 4, memory cards 5 - 8, and power supply 1
Zone3 (right) = Fan 3, HDDs, SAS adapter, and PCIe slots 1 - 7
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