Installation Guide, Seventh Edition - HP Integrity rx4640 Server

Installing Additional Components
Installing Internal Components
Chapter 3
51
• Slot 3 and 4 is the first pair of shared slots, and slot 5 and 6 is the second pair of shared slots. The
maximum capability of each of the shared slot is PCI-X 66MHz. If a PCI-X 133 MHz card is placed in a
shared slot, then the maximum capability the 133 MHz card can run at is 66MHz. If different modes (PCI
vs. PCI-X) or slower speeds (33 MHz) are used, the slot used automatically downgrades to accept the
change.
Shared slots have card compatibility restrictions. If one of the shared slots is occupied, then the card
being 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 is rejected. If the new card has a faster capability
than the current bus configuration, it only runs at the bus mode and frequency of the current bus
configuration (slower).
1. If you have a 66 MHz card in slot 3 and you hot-plug insert a 33 Mhz card into slot 4, the operation
will not work. The new 33 MHz card does not initialize and the slot powers down, because you cannot
change bus speeds during hot-plug operations.
NOTE If the server is rebooted in the new configuration, both cards will initialize to run at 33
MHz. This is because the system firmware can only change the bus capability from 66
MHz down to 33 MHz.
2. If you have a 33 MHz card in slot 3 and you hot-plug insert a 66 Mhz card into slot 4, it works, but the
new card runs at 33 MHz. This also applies to slots 5 and 6 as they are shared (both use a common
bus).
3. If your unit is powered-down, and you insert a 33 MHz card into slot 4 (that shares a 66 MHz card in
slot 3), then both cards run at 33 MHz when the unit is powered-up. This also applies to slots 5 and 6
as they are shared (both use a common bus).
• Slots 7 and 8 are single slots. The maximum capability of each slot is PCI-X 133MH. Only slots 7 and 8
allow 133 Mhz, PCI-X cards to run at full speed. These two slots are not limited by incompatibilities that
are related to bus mode frequency.
Table 3-6 PCI-X Card vs. Slot Frequency/Bus Mode Compatibility for Shared Slots
a
Current PCI Bus
Mode and
Frequency for
the Shared Slot
Cards to be installed
PCI 33 PCI 66 PCI-X 66 PCI-X 133
PCI 33 MHz
Compatible
b
Compatible
b
New card running at
PCI 33
Compatible
b
New card running
at PCI 33
Compatible
b
New card running at
PCI 33
PCI 66 MHz Incompatible-
Frequency
c
Compatible
b
Compatible
b
New card running
at PCI 66
Compatible
b
New card running at
PCI 66
PCI-X 66 MHz Incompatible-
Frequency
c
Incompatible-Bus
d
Compatible
b
Compatible
b
New card running at
PCI-X 66
PCI-X 133 MHz
e
Incompatible-
Frequency
c
Incompatible-
Frequency
c
Compatible
b
New card running
at PCI-X 66
Compatible
b
New card running at
PCI-X 66