NEC 5800/320MA Paired PCI Slots and Duplex Operation of PCI Adapters, PCI Adapter Slot Numbering

Paired PCI Slots and Duplex Operation of PCI Adapters

No slots are reserved; however, you can install full-height PCI adapters only in slot 2 or slot 3.

See the Hardware Requirements section in each chapter for specific installation recommendations for each adapter.

N O T E

You must insert PCI-slot filler panels in empty PCI slots to maintain proper airflow.

Figure 1-1. PCI Adapter Slot Numbering

1

3

2

3

2

asys030

1Slot 1 - PCI Slot Info - 9 (low-profile slot)

2Slot 2 - PCI Slot Info - 10 (full-height slot, when present)

3Slot 3 - PCI Slot Info - 11 (full-height slot, when present)

Paired PCI Slots and Duplex Operation of PCI Adapters

Matched PCI adapters located in the same-numbered slot of two I/O elements are known as paired adapters. For example, if you install the same model of PCI adapter in PCI slots 10/1 and 11/1 (where 10 and 11 are the I/O element numbers and 1 is the slot number), the adapters are paired.

As long as each PCI adapter in a pair is configured properly and functioning normally, the pair of adapters is marked as duplexed in ftSMC, meaning that the adapters are fault tolerant and safe to pull. If you remove one PCI adapter in the pair, the other adapter keeps the system operational. Conversely, if one of the adapters in the pair is missing, or if one of the adapters fails, the remaining adapter is marked as simplexed in ftSMC, meaning that the adapter is not fault tolerant, and it is unsafe to pull.

1-4Express5800/320Ma: PCI Adapter Guide