User`s guide

Add-in Board Slots
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Add-in Board Slots
The baseboard has eight slots for PCI add-in boards supported by three PCI bus
segments called PCI-A, PCI-B, and PCI-C. There are two slots on PCI-A, four slots on
PCI-B, and two slots on PCI-C. PCI-C supports half-length boards (5.6 inches to 6.3
inches) only; the other slots support full-length boards.
The two slots for the PCI bus segment PCI-C consume a maximum of 375 mA of standby
current on a 3.3 V Aux power line. The remaining six slots do not have any 3.3 V Aux
capabilities.
Both PCI segments A and B allow you to add, remove, or replace PCI add-in boards
installed in their slots without interrupting normal operation or powering down the
system. To use this PCI Hot-Plug (PHP) feature, a server system requires PCI Hot-Plug
software and PCI Hot-Plug capable add-in boards. PCI Hot-Plug software usually is a
driver loaded for a specific operating system.
Note: At this time, the Linux operating system does not support use of the PCI Hot-Plug
(PHP) feature. If you are running Linux, your system must be turned off before installing
or removing PCI boards. Windows 2000 requires drivers that are PHP compatible in
order to use the PHP feature.
Each Hot-Plug PCI slot has two LEDs. The green LED indicates the state of power on for
each slot. The amber LED indicates an error condition with that slot.
The table below summarizes typical LED states that you may encounter during a
system's operation.
Table 2-2 Slot State Indicators
LED State Status
Green On
Amber Off
The slot is on and functioning normally.
Green On
Amber On
The slot is on and the card requires attention.
Green Off
Amber On
The slot is off and the card in the slot requires
attention.