NonStop NS-Series Planning Guide (H06.03+)

Modular System Hardware

HP Integrity NonStop NS-Series Planning Guide—529567-004

2-9

Processor Slice

The slice midplane for logic interconnection and power distribution, which is part of the

chassis assembly, is not a FRU.

Two slices provide up to four processor elements in high-availability duplex

configuration, with eight slices providing a full 16-processor duplex system. For a fault-

tolerant triplex system, three slices provide four processors with 12 slices providing a

full 16-processor triplex system.

This illustration shows the rear of the slice enclosure, equipped with two power

supplies and eight optic adapters:

The numbers below the optic connectors refer to the processor numbers within the

slice enclosure. Currently, only connectors J0, J1, J2, and J3 are used. The remaining

optic adapter J connectors are for future capabilities of the slice hardware.

Labels for the optic cable connections can become complex in a large system. Fiber-

optic cables for the ServerNet fabric and also the slice optic cable connections use the

same type of optical connector.

Because the modular hardware provides considerable flexibility in how the hardware is

distributed among multiple racks, a single rack could contain four slices, with each slice

a member of a different processor complex.

To reduce ambiguity in identifying proper cable connections to the processor complex,

an identification convention uses combinations of a letter to refer to each connection. A

number such as 0, 1, 2, and 3 identifies processor complexes, and a letter such as A,

B, or C identifies the slice. Therefore, a single slice is identified with an alpha-numeric

Note. Integrity NonStop NS-series systems do not support duplex and triplex processors

within the same system.

Caution. To maintain proper cooling air flow, blank panels must be installed in all slots that do

not contain optic adapters.

AC Power

Connector

VST170.vsd

Slice Enclosure (back)

Power Supply (2)

J Optic Adapters

(cables to LSU)

K Optic Adapters

(cables to LSU)

S T Q R

Reintegration

Connectors (cables

to peer slices)