IBM xSeries 440 8687, Hardware Maintenance Manual

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Notices and statements used in this book
The caution and danger statements used in this book also appear in the multilingual
Safety Information book provided on the IBM xSeries Documentation CD and in
“Safety notices (multi-lingual translations)” on page 205. Each caution and danger
statement is numbered for easy reference to the corresponding statement in the
safety book.
The notice and statement definitions are as follows:
v Notes: These notices provide important tips, guidance, or advice.
v
Important: These notices provide information or advice that might help you avoid
inconvenient or problem situations.
v 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.
v Caution: These statements indicate situations that can be potentially hazardous
to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.
v
Danger: These statements indicate situations that can be potentially lethal or
extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure step or
situation.
What the IBM xSeries 440 offers
The design of the server takes advantage of advancements in memory
management and data storage. The server includes:
v IBM Enterprise X-Architecture
Enterprise X-Architecture is an IBM design blueprint that takes full advantage of
existing IBM technologies to build the most powerful, scalable, and reliable Intel
processor-based servers. For more information about IBM Enterprise
X-Architecture, refer to
www.ibm.com/pc/us/eserver/xseries/xarchitecture/enterprise/index.html
v Active Memory
Memory Mirroring offers even greater memory reliability. With the same amount
of memory in both memory ports and Memory Mirroring enabled in BIOS code,
the data from the first memory port is copied or mirrored in the second, giving
you redundant copies of the information stored in memory.
v Memory ProteXion
This is the equivalent of a hot-spare drive in a RAID array. Memory ProteXion is
based in the memory controller, giving the server the ability to sense when a chip
on a DIMM has failed and route the data around the failed chip.
v
Large system memory
The memory bus in the server supports up to 32 GB of system memory. The
memory controller provides error code correction (ECC) support for up to 32
industry-standard PC133, 3.3 V, 168-pin, 133 megahertz (MHz), registered,
synchronous dynamic random access memory (SDRAM) dual inline memory
modules (DIMMs).
v XceL4 Server Accelerator Cache
With up to 64MB of high-performance level-4 system cache, the xSeries 440
introduces XceL4 cache, designed by IBM specifically to alleviate the memory
bandwidth demands that the new Intel processors place on the memory
General information
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