Sun Microsystems Fire 880, Руководство пользователя

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68 Sun Fire 880 Server Owner’s Guide • August 2001
About PCI Cards and Buses
All system communication with storage peripherals and network interface devices is
mediated by two Peripheral Component Interconnect (PCI) bridge chips, located on
the system’s motherboard. Each bridge chip manages communication between the
system’s main interconnect bus and two PCI buses, giving the system a total of four
separate PCI buses. The four PCI buses support up to nine PCI interface cards and
four motherboard devices.
The following table describes the PCI bus characteristics and maps each bus to its
associated bridge chip, motherboard devices, and PCI slots. All slots comply with
PCI Local Bus Specification Revision 2.1.
The system’s PCI hot-plug feature lets you remove and install PCI cards while the
system is running. You can hot-plug any standard PCI card, provided that its Solaris
device drivers support PCI hot-plug operations, and the system is running the
Solaris 8 7/01 operating environment or a subsequent release that supports
Sun Fire 880 PCI hot-plug operations. In addition, the PCI card must comply with
the PCI Hot-Plug Specification Revision 1.1.
PCI hot-plug procedures may involve software commands for preparing the system
prior to removing a card and for reconfiguring the operating environment after
installing a PCI card. For more information about PCI hot-plug procedures, see
“About Hot-Pluggable and Hot-Swappable Components” on page 144.
PCI Bridge PCI Bus
Clock Rate (MHz)/
Bandwidth (bits)/
Voltage (V)
Motherboard Devices PCI Slots
0 PCI A 66 MHz/
64 bits/
3.3V Gigabit Ethernet controller
FC-AL controller None
0 PCI B 33 MHz/
64 bits/
5V SCSI controller (interface to the
internal DVD drive and optional
tape drive) Slots 0, 1, 2, 3
1 PCI C 33 or 66 MHz/
64 bits/
3.3V None Slots 7 and 8
1 PCI D 33 MHz/
64 bits/
5V RIO ASIC (Ethernet, USB, and
EBus interfaces) Slots 4, 5, 6