IBM OpenPower 720, Технический обзор и введение

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Chapter 2. Architecture and technical overview
27
2.5.1 PCI-X slots and adapters
PCI-X, where the X stands for extended, is an enhanced PCI bus, delivering a bandwidth of
up to 1 GB/sec, running a 64-bit bus at 133 MHz. PCI-X is backward compatible, so
OpenPower 720 systems can support existing 3.3 volt PCI adapters.
The PCI-X slots in the system support hot-plug and Extended Error Handling (EEH). In the
unlikely event of a problem, EEH-enabled adapters respond to a special data packet
generated from the affected PCI-X slot hardware by calling system firmware, which will
examine the affected bus, allow the device driver to reset it, and continue without a system
reboot.
64-bit and 32-bit adapters
IBM offers 64-bit adapter options for the OpenPower 720, as well as 32-bit adapters.
Higher-speed adapters use 64-bit slots because they can transfer 64 bits of data for each
data transfer phase. Generally, 32-bit adapters can function in 64-bit PCI-X slots; however,
some 64-bit adapters cannot be used in 32-bit slots. For a full list of the adapters that are
supported on the OpenPower 720 systems, and for important information regarding adapter
placement, see the
IBM
Sserver
Hardware Information Center
. You can find it at:
http://www.ibm.com/openpower/en_US/infocenter/base/
2.5.2 LAN adapters
The dual port internal 10/100/1000 Mbps RJ-45 Ethernet controller integrated on the system
planar can be used to connect an OpenPower 720 to a local area network (LAN).
See the Table 2-1 for the list of additional LAN adapters available at the time of writing. IBM
supports an installation with NIM using an Ethernet adapter (CHRP
2
is the platform type).
Table 2-1 Available LAN adapters
2.5.3 Graphic accelerators
The OpenPower 720 supports up to two enhanced POWER GXT135P (FC 2849) 2D graphic
accelerators. The POWER GXT135P is a low-priced 2D graphics accelerator for OpenPower,
pSeries, and p5 servers. It can be configured to operate in either 8-bit or 24-bit color modes
running at 60 Hz to 85 Hz. This adapter supports both analog and digital monitors. The
adapter requires one short 32-bit or 64-bit PCI-X slot.
2
CHRP stands for Common Hardware Reference Platform, a specification for PowerPC-based systems that can run
multiple operating systems.
Feature code Adapter description Slot Size Max
1985 10/100 Ethernet 32 or 64 short 5
1978 Gigabit Ethernet 64 short 5
1979 10/100/1000 Ethernet 64 short 5
1983 2-port 10/100/1000 Ethernet 64 short 5
1984 2-port Gigabit Ethernet - SX 64 short 5
1981 IBM 10 Gigabit Ethernet-SR PCI-X Adapter 64 short 2
1982 IBM 10 Gigabit Ethernet-LR PCI-X Adapter 64 short 2