User Service Guide, Second Edition - HP Integrity BL60p Server Blade

Troubleshooting

Enclosure Information

Chapter 5

Enclosure Information

This installation document only covers the BL60p server blade itself, and does not include any specific server

blade enclosure information. For server blade enclosure information, go to:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00172260/c00172260.pdf

Cooling Subsystem

Each server blade contains 4 dual-rotor cooling fans. Three of the four cooling fans cool both processors and

the communications module. One of the four cooling fans cools the PDH module, the Zx1 chip, and the

memory DIMMs.

Communications Module (LBAs, Ropes, and PDH/PCI-X Buses)

This subsection provides information on troubleshooting issues with the internal PCI-X buses.

I/O Subsystem Behaviors

The main role of the I/O subsystem is to transfer blocks of data and instruction words between physical

shared memory and virtual memory (system disks/disk array). The system boot is the first time blocks of data

and instructions words are transferred into physical shared memory from a local disk/DVD, or from a remote

disk on another server through multiple LAN transfers. This process is referred to as Direct Memory Access

(DMA), and is initiated by I/O devices located in core I/O or on I/O device controllers, and does not involve any

processors.

A secondary role of the I/O subsystem is to transfer four bytes of data between the internal registers within

each CPU core, and the internal control/store registers within the Zx1/PDH /Local Bus Adapters (LBA) and

device controller chips. This process is referred to as programmed I/O, and is initiated by any CPU executing

external LOAD/STORE instructions. (Note that both system firmware and the HP-UX kernel use this method

to initiate DMA transfers.)

Customer Messaging Policy

• Always point the customer to the SEL for any action from low level I/O subsystem faults. IPMI events in

SEL/FPL provide the logical Acpi path of the suspect I/O subsystem FRU. Use Table 5-12 to determine the

physical device controller.