Notices Used In This Book; What Your Xseries 250 Offers - IBM eServer 250 xSeries User Reference Manual

Notices used in this book

What your xSeries 250 offers

The caution and danger notices also appear in the multilingual Safety Information book
provided on the IBM xSeries Documentation CD that comes with your xSeries product.
Each notice is numbered for easy reference to the corresponding notices in the safety
book.
The following types of notices are used in this book:
• Note: These notices provide important tips, guidance, or advice.
• Important: These notices provide information or advice that might help you
avoid inconvenient or problem situations.
• 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 the description of a potentially
hazardous procedure step or situation.
• Danger: These notices indicate situations that can be potentially lethal or
extremely hazardous to you. A danger notice is placed just before the description
of a potentially lethal or extremely hazardous procedure step or situation.
The unique design of your server takes advantage of advancements in symmetric
multiprocessing (SMP), data storage, and memory protection. Your server combines:
• Impressive performance using an innovative approach to SMP
Your server supports up to four Pentium III Xeon microprocessors. Your server
comes with one microprocessor installed; you can install additional
microprocessors to enhance performance and provide SMP capability.
• Large data-storage and hot-swap capabilities
All models of the server support up to 10 slim-high hot-swap hard disk drives.
This hot-swap feature enables you to remove and replace hard disk drives without
turning off the server.
• Hot-plug peripheral component interconnect (PCI) adapter capabilities
Your server has four hot-plug slots for Active PCI ™ adapters. With operating
system support, you can replace failing hot-plug PCI adapters without turning off
the server. If the hot-add feature is supported by your operating system and the
PCI adapter, you can also add PCI adapters in these slots without turning off the
server.
• Redundant cooling and power capabilities
The redundant cooling and hot-swap capabilities of the fans in your server enable
continued operation if one of the fans fails, because you can replace a failing fan
without turning off the server.
The server comes standard with two 250-watt power supplies. You can install one
additional power supply to support redundancy for a typical configuration.
• Large system memory
The memory bus in your server supports up to 16 GB of system memory. The
memory controller provides error correcting code (ECC) support for up to 16
industry-standard, 3.3 V, 168-pin, 8-byte, registered, dual inline memory modules
(DIMMs). The memory controller also provides Chipkill™ memory protection.
Chapter 1. Introducing the IBM xSeries 250
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