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Cache Accelerators

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2-42 Compaq ProLiant 8000 Intel Pentium III Xeon 700MHz Servers Maintenance and Service Guide Cache Accelerators Cache accelerators are found where more than one processor bus is used. Figure 2-36 shows the location of cache accelerators and . 1 2 Figure 2-36. Cache accelerators CAUTION: Cache accelerators are susceptible to damage from electrostatic discharge. Do not touch the metal chassis while removing the accelerators. IMPORTANT: For best performance, install the first four processors in processor slots 1-4. Cache accelerators must be used if processors are installed on both buses. Operating the server with processors installed in both buses but without the cache accelerators will prevent the system from booting and will cause an error message to be displayed.

Section	Page
Illustrated Parts Catalog	10
Mechanical Parts Exploded View	11
Mechanical Spare Parts List	12
System Components Exploded View	14
System Components Spare Parts List	15
Removal and Replacement Procedures	18
Electrostatic Discharge Information	18
Symbols in Equipment	19
System Interlocks	20
Preparation Procedures	20
Hot-Pluggable Parts	20
Non-Hot-Pluggable Parts	20
Turning Off the Server	21
Rack Warnings	22
Servers Warnings and Precautions	22
Top Access Panel	23
Right Side Access Panel	24
Left Side Access Panel	25
Casters	26
Front Air Baffle	27
Rear Air Baffle	28
Main Processor Air Baffle	29
Face Plates	30
Removable Media Trim	30
Front Bezel	31
Mass Storage and Removable Media Devices	32
Removable Media Blanking Panel	33
Removable Media Devices	34
Hard Drive Blanking Panels	35
Hot-Plug Drive Replacement Guidelines	36
Hot-Plug Drive Replacement Precautions	36
Drive Cage with Backplane Board	38
Power On/ Standby Switch	39
Power Supply Lock Bar	41
Power Supplies	42
Power Supply Blanking Panel	43
Hot-Plug Power Supplies	44
Power Backplane Board	46
Fans	47
Hot-Plug Rear Processor Fan	47
Redundant Rear Processor Fan	48
Hot-Plug Front Processor Fan Assembly	49
Redundant Front Processor Fan Assembly	50
Hot-Plug Front I/ O Fans	51
Hot-Plug I/O Fan Board	53
SDRAM Memory	54
Dual Inline Memory Modules	54
Memory Expansion Board	55
Cache Accelerators	59
Processors, Processor Power Modules, Processor Terminator Boards, Processor Board with Tray	62
Processor	63
Processor Power Modules	67
Processor Terminator Boards	71
Lower Processor Support Structure	72
Upper Processor Support Structure	74
Processor Board with Tray	75
Integrated Management Display	79
I/O Expansion Slots and Related Components	80
Array Controllers with Extended SCSI	84
Extended SCSI Dividers	87
I/O Expansion Boards	88
Cabling Diagrams	89
Hot-Plug Basket Insulator	91
Expansion Board Guide	92
PCI Hot Plug Interface Board	93
I/O Board	94

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2-42

Compaq ProLiant 8000 Intel Pentium III Xeon 700MHz Servers Maintenance and Service Guide

Cache Accelerators

Cache accelerators are found where more than one processor bus is used. Figure 2-36 shows the

location of cache accelerators

and

Figure 2-36.

Cache accelerators

CAUTION:

Cache accelerators are susceptible to damage from electrostatic discharge. Do not

touch the metal chassis while removing the accelerators.

IMPORTANT:

For best performance, install the first four processors in processor slots 1-4. Cache

accelerators must be used if processors are installed on both buses.

Operating the server with processors installed in both buses but without the cache accelerators will

prevent the system from booting and will cause an error message to be displayed.