Specifications

Chapter 2. Architecture and technical overview 69
Table 2-17 shows the I/O bandwidth for available processors cards.
Table 2-17 I/O bandwidth
2.6.2 Flexible Service Processor bus
The Flexible Service Processor (FSP) flex cable, which is located at the rear of the system, is
used for FSP communication between the system drawers. A FSP card (#5664) is installed in
system drawer 1 and system drawer 2, and the FSP/Clock Pass-Through card (#5665) is
installed in system drawer 3 and system drawer 4 for connecting FSP flex cable. The FSP
cable has been changed to point-to-point cabling similar to the processor drawer interconnect
cable. When a system drawer is added, another FSP flex cable is added. A detailed cable
configuration is discussed in 2.5, “CEC Enclosure interconnection cables” on page 63.
2.7 Internal I/O subsystem
The internal I/O subsystem resides on the I/O planar, which supports eight PCIe slots. All
PCIe slots are hot-pluggable and enabled with enhanced error handling (EEH). In the unlikely
event of a problem, EEH-enabled adapters respond to a special data packet that is generated
from the affected PCIe slot hardware by calling system firmware, which examines the
affected bus, allows the device driver to reset it, and continues without a system reboot.
Processor card Slot description Frequency Device Bandwidth
(maximum
theoretical)
#4983, #4984
or #5003
CPU Socket 0
(CP0) GX bus 1
2.464 Gbps P7IOC-B 19.712 GBps
CPU Socket 0
(CP0) GX bus 0
2.464 Gbps P7IOC-A 19.712 GBps
CPU Socket 1
(CP1) GX bus 1
2.464 Gbps GX slot 2 19.712 GBps
CPU Socket 1
(CP1) GX bus 0
2.464 Gbps GX slot 1 19.712 GBps
Single enclosure 78.848 GBps
Total (4x enclosures) 315.392 GBps
#EP24 CPU Socket 0
(CP0) GX bus 1
2.464 Gbps P7IOC-B 19.712 GBps
CPU Socket 2
(CP2) GX bus 0
2.464 Gbps P7IOC-A 19.712 GBps
CPU Socket 3
(CP3) GX bus 0
2.464 Gbps GX slot - lower 19.712 GBps
CPU Socket 1
(CP1) GX bus 1
2.464 Gbps GX slot - upper 19.712 GBps
Single enclosure 78.848 GBps
Total (4x enclosures) 315.392 GBps