The BladeCenter HS20 uses the IntelĀ® Lindenhurst chipset (see the HS20 architecture in Figure 2-6).

8843 HS20 Block Diagram

 

 

Servicing the IBM ^

 

 

 

 

 

 

 

HS20 (M/T 8843) and Blade

 

 

 

 

 

 

 

Storage Expansion-II Option

Due to space

 

10.1

 

Nocona

 

 

Nocona

 

 

10.1

 

 

XEON

 

 

XEON

 

 

limitations this

 

 

 

 

 

VRM

 

CPU

 

 

CPU

 

 

VRM

diagram is not

 

 

 

 

 

 

 

 

 

 

 

 

drawn to scale

To SP I2C bus

 

 

Data A

To SP I2C bus

 

 

 

Hublink 1.5

MCH

Data B

 

 

 

ICH-S

 

 

 

 

 

 

 

 

 

LPC

 

 

 

 

 

 

 

PCI

 

 

 

 

 

USB ports to

 

 

DDR2

bus 0

 

 

PCI

 

 

HD connectors

 

 

400Mhz 2GB

 

 

 

 

x8

To SP

 

 

DIMMs

 

 

 

32/33

 

I2C bus

 

 

sockets

 

 

 

 

PCIExpress

 

 

PCIX 66

PCI Express x4

 

 

VPD 32KB

 

 

 

 

 

 

 

 

EEPROM

 

 

 

 

 

 

 

 

I2C bus

Renassas

 

 

 

 

PXH

 

 

 

 

SP (2166)

 

 

 

 

ATI

 

 

Video

 

 

 

LSI

 

Pri Sec

 

 

 

 

Broadcom

 

7000M

 

PCIX C

 

 

1020

 

 

 

 

 

 

5704S Ethernet

SCSI

 

 

 

 

 

 

Video

 

 

controller

 

 

 

PCIX B

 

 

 

 

 

 

 

 

 

 

 

 

 

1Gb Ethernet

1 Gb

 

 

 

 

 

 

 

 

 

 

Daughter card connector

 

 

 

 

 

Ethernet

SCSI HDD Connector 1

Blade

 

 

Blade HD

Blade HD

 

 

 

 

Expansion

 

connector A

connector B

 

 

 

 

 

Midplane HD

Midplane HD

SCSI HDD Connector 1

Connector

 

 

 

 

 

 

 

 

connector A

connector B

Figure 2-6 HS20 architecture

 

 

 

 

 

 

 

The Intel Lindenhurst chipset consists of the following components:

ļææMemory and I/O controller (MCH) (North Bridge)

ļææPXH-D

ļææICH-S (South Bridge)

The Lindenhurst MCH, Memory and I/O controller provides the interface between the processors, the memory, and the PCI Express busses that interface to the other Intel chips. The Lindenhurst ICH-S (South Bridge) provides the USB interfaces, the local Service Processor interface, the POST/BIOS flash EEPROM interface, and the PCI bus interface for the ATI Radeon Mobility Video controller and LSI 1020 SCSI Host Controller. The PXH interfaces the Broadcom BCM5704S ethernet controller on its secondary bus and the daughter card on its secondary bus. I/O functions on the 8843 include Video, I2C, USB, SCSI, Gigabit Ethernet, and USB (floppy, CD-ROM (DVD), mouse, and keyboard).

The LPC bus is used to connect to the POST/BIOS EEPROM on the 8843. The size of the EEPROM is 4 MB x 8, and it contains primary BIOS, backup BIOS, and blade diagnostics.

Chapter 2. IBM Eserver BladeCenter overview 11

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IBM L2/3 manual Pxh-D