Technical data

nPartition System Overviews

I/O Chassis in HP Superdome Compute Cabinets

HP System Partitions Guide: Administration for nPartitions, rev 5.1

• I/O Chassis in HP Superdome IOX Cabinets on page 51

• I/O Chassis for HP rp7410 and rp8400 Servers on page 54

I/O Chassis in HP Superdome Compute Cabinets

Each HP Superdome I/O chassis can connect to one cell in the same

compute cabinet.

A Superdome I/O chassis has 12 slots, numbered from 11 to 0. The HP

Superdome core I/O card ﬁts only in slot 0.

Card slot details for Superdome I/O chassis are in Table 1-1.

In HP Superdome I/O chassis, all slots can operate as 64-bit slots and

can accept 66 MHz PCI cards.

HP Superdome I/O chassis slots 0–3 and 8–11 can accept cards that are

physically keyed as 5-volt cards or are keyed as universal cards. These

slots normally operate at 33 MHz with 5-volt signaling, but when a

66 MHz capable card is detected they are switched by software to operate

at 66 MHz with 3.3-volt signaling.

Slots 4–7 in a Superdome I/O chassis can accept cards that are physically

keyed as 3.3-volt cards or are keyed as universal cards. These slots can

operate at 66 MHz or 33 MHz with 3.3-volt signaling only.

Slots 4–7 also are dual-rope slots, which have two connections between

the slot’s local bus adapter (LBA) and the I/O chassis system bus adapter

(SBA). All other slots are single-rope slots, which have a single

connection between the slot LBA and the I/O chassis SBA. The dual-rope

slots can have greater sustained bandwidth than single-rope slots.

Table 1-1 HP Superdome I/O Chassis:

Card Slot Details

Slot

Number

11109876543210

Signaling

(Volts)

5.0 / 3.3 3.3 5.0 / 3.3

Hardware

Fabric

single rope dual rope single rope

Cards

Accepted

PCI cards keyed as

5-volt or universal.

PCI cards keyed as

3.3-volt or universal.

PCI cards keyed as

5-volt or universal.