Notices Used In This Book; What Your Ibm Xseries 150 Offers - IBM xSeries 150 User Reference Manual

Notices used in this book

What your IBM xSeries 150 offers

This information product contains notices that relate to a specific topic. The Caution
and Danger notices also appear in the multilingual safety booklet that came with your
xSeries product. Each notice is numbered for easy reference to the corresponding
notices in the safety booklet.
The notice definitions are as follows:
• Notes:These notices provide important tips, guidance, or advice.
• Attention:These notices indicate possible damage to programs, devices, or data.
An attention notice is placed just before the instruction or situation in which
damage could occur.
• Caution:These notices indicate situations that can be potentially hazardous to
you. A caution notice is placed just before descriptions of potentially hazardous
procedure steps or situations.
• Danger: These notices indicate situations that can be potentially lethal or
extremely hazardous to you. A danger notice is placed just before descriptions of
potentially lethal or extremely hazardous procedure steps or situations.
The unique design of your server takes advantage of advancements in symmetric
multiprocessing (SMP), data storage, and memory management. Your server
combines:
• Impressive performance using an innovative approach to SMP
Your server supports up to two Pentium III microprocessors. Your server comes
with one microprocessor installed; you can install an additional microprocessor
to enhance performance and provide SMP capability.
• Large data-storage and hot-swap capabilities
All models of the server support up to six hot-swap hard disk drives. This hot-
swap feature enables you to remove and replace hard disk drives without
turning off the server.
• Redundant power capabilities
The standard 250-watt power supply in your server can handle a load of up to
250 watts. By replacing the power backplane with the power backplane option,
you can install a second, optional power supply. This provides a full 500 watts
of power. If the average load on your server is less than 250 watts and a problem
occurs with one of the power supplies, the other power supply can handle the
load (redundant power). If the average load on your server is greater than 250
watts, and you have installed a second power supply, you can install a third,
optional power supply to provide redundancy.
The NON light emitting diode (LED) on the system board is lit when the power
load is 250 watts or greater with two power supplies, or when the power load is
500 watts or greater with three power supplies.
• Large system memory
The memory bus in your server supports up to 4gigabytes (GB) of system
memory. The memory controller provides error correcting code (ECC) support
for up to four industry standard PC133, 3.3 V, 168-pin, 8-byte, registered,
synchronous-dynamic-random access memory (SDRAM) dual inline memory
modules (DIMMs).
Chapter 1. Introducing the IBM xSeries 150
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