Lenovo System x3850 X6 Quick Start Manual page 14

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Figure 10 shows the numbering of the PCIe slots of the x3950 X6.

Slots: 65 66 67

Slots:

Figure 10 x3950 X6 PCIe slot numbering

Important notes

Keep in mind the following important aspects of the I/O subsystem when setting up and using

your server:

Proper I/O placement is dependent on the types of adapter cards. Have at least two of any

type of adapter in the system to maintain enough I/O to keep the processors busy. For low

latency or high bandwidth applications, consider using one adapter per processor to give

each CPU direct access to I/O. In general, at least one host bus adapter (HBA), if HBAs

are used, and one NIC should be present in the Primary I/O Book (Slots 7-9 in a

four-socket configuration or Slots 39-41 in an eight-socket configuration) and the

additional adapters should be populated so that you have one adapter type per book. If

using an eight-socket configuration, have at least one HBA in slots 39-41 and Slots 7-9

first. After the initial one adapter type per CPU population is complete, go back and

populate from higher numbered slots to lower numbered slots using the same population

rule as before (one adapter type per I/O Book).

Take care when inserting I/O Books to avoid damaging either the connector on the I/O

Book itself or the midplane. Inserting the I/O Book at an angle or with I/O cables attached

can lead to the I/O Book damaging the midplane.

To install the Full Length I/O Book, do the following, as shown in Figure 11:

a. Install the support plate.

b. Insert the long I/O Book.

Lenovo System x3850 X6 and x3950 X6 Quick Start Guide

68 69 70 71 72 73 74

Bay 1

Bay 2

Bay 3

Bay 4

1 2 3

4 5 6

7 8 9 10

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System x3950 x6