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

Introduction
Server Blade Components
Chapter 1
20
I/O Subsystem (Communications Module)
The I/O solution for the server blade is to use a communications module for the LAN and Fibrechannel to
communicate over the blade enclosure signaling backplane (through the system board). The module design
meets the following objectives:
• Functions correctly and consistently with the BL p-Class LAN and Fibrechannel solutions.
• Module design works with the existing HP-UX drivers for the BCM 5704 and ISP 2312.
The LAN and Fibrechannel portions of the design emulate the HP AB456 combo card logical design to
ensure correctness and consistency from an HP-UX driver context.
• Meets the mechanical and thermal constraints of the server blade design.
As part of the I/O solution for the server blade, the communications module provides the following I/O
connections:
• Two dual 10/100/1000 LAN connections (four links) routed to the system interface connector.
• Dual 2 Gb Fibrechannel connections routed to the system interface connector.
Memory Subsystem
The server blade physical memory layout includes the DDR SDRAM memory DIMMs, along with the memory
bus traces and required termination. The memory subsystem supports only Double Data Rate Synchronous
Dynamic Random Access Memory (DDR SDRAM) technology utilizing industry-standard PC2100 type DDR
SDRAM DIMMs. The DIMMs use a 184-pin JEDEC standard connector. The server blade memory subsystem
provides two memory cells; each cell is 144 bits wide each (128 bits of data, 16 bits of ECC). Each cell
accommodates two DIMM slots; in the server blade, space and power limitations restrict the total loaded
DIMM count to four slots (two DIMMs per cell).
The minimum amount of memory available for the server blade is 1 GB (2 x 512 MB DIMMs). The maximum
amount of memory available for the server blade is 8 GB (4 x 2 GB DIMMs).
Load the server blade DIMMs in pairs. To enable chip sparing, load four DIMMs of the same size and
configuration. Table 1-2 summarizes the server blade memory solutions.
NOTE Loading DIMMs as a quad (four identical DIMMs) enables chip sparing.
The DIMMs used in the BL60p server blade must be low-profile (1.2” tall) DIMMs. The DIMMs are standard
DDR2100 registered DIMMs. Only DIMMs qualified by HP are supported. This is the DIMM load order for
the blade server:
• Load slots DIMM0A and DIMM0B first
• Load slots DIMM1A and DIMM1B second
Table 1-2 Server Blade Memory Array Capacities
Min / Max Memory Size Single DIMM Sizes
1 GB / 2 GB 512 MB DIMM
2 GB / 4 GB 1 GB DIMM
4 GB / 8 GB 2 GB DIMM