NOTE:
Shared slots have card compatibility restrictions. If one of the shared slots is
occupied, the card added to the second slot is limited by the configuration of the occupied
slot. If the new card has a slower capability than the current bus configuration, it fails. If the
new card has a faster capability than the current bus configuration, it only runs at the slower
bus mode and frequency of the current bus configuration.
The following are common configuration scenarios for cards that use shared slots. These
examples also apply to slots nine and ten because they are shared (both use a common
bus).
1.
If there is a PCI-X 66 MHz card in slot 7, and you hot-plug a PCI 33 MHz card into slot
8, the operation fails. The new PCI 33 MHz card does not initialize and the slot powers
down because you cannot change bus speed during hot-plug operations. The new card
has a slower bus speed than the current card.
NOTE:
If the server is rebooted in this configuration, both cards initialize to run at PCI
33 MHz. The system firmware can only change the bus capability down to the lowest
common value.
2.
If there is a PCI 33 MHz card in slot 7, and you hot-plug insert a PCI-X 66 MHz card
into slot 8, the new card works but it runs at PCI 33 MHz.
3.
If the server is powered off, and you insert a PCI 33 MHz card into slot 7 (that shares
a common bus with a PCI-X 66 MHz card in slot 8), then both cards run at PCI 33 MHz
when the server powers up.
The following describes configuration requirements for slots one through ten on the
PCI/PCI-X/PCIe I/O backplane:
•
PCI-X slots 1 and 2 are reserved for use by the core I/O cards PCI-X SAS core I/O cards
and the Gigabit Ethernet LAN core I/O card. Slots 1 and 2 are not hot-pluggable. Install only
supported PCI-X SAS and LAN core I/O cards in slots 1 and 2. PCIe slots 3 and 4 are used
for the PCIe SAS Core I/O cards, but are public slots. If the PCIe core I/O is not installed,
these slots are available for other PCIe I/O cards.
•
Slots 3 and 4 are swtiched PCIe x8
•
Slots 5 and 6 are nonswitched PCIe x8.
•
Slots 7 and 8 are nonshared slots. The maximum speed for cards in slots 7 and 8 is PCI-X
133 MHz.
•
Slots 9 and 10 are shared slots. These two slots are limited by bus mode or frequency-related
incompatibilities.
IMPORTANT:
Slots 9 and 10 on the PCI/PCI-X/PCIe I/O backplane have the same
configuration limitations as slots 9 and 10 on the PCI/PCI-X I/O backplane.
lists the PCI/PCI-X card slot frequency and bus mode compatibility for shared slots.
Removing and Replacing a Hot-Pluggable PCI/PCI-X/PCIe Card
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