Paired Pci Slots And Duplex Operation Of Pci Adapters; Figure 1-1. Pci Adapter Slot Numbering - NEC Express5800/320Ma Manual

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.

Figure 1-1. PCI Adapter Slot Numbering

3
2
3
2
1 Slot 1 - PCI Slot Info - 9 (low-profile slot)
2 Slot 2 - PCI Slot Info - 10 (full-height slot, when present)
3 Slot 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.
1-4 Express5800/320Ma: PCI Adapter Guide
N O T E
You must insert PCI-slot filler panels in empty PCI slots to
maintain proper airflow.
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