NEC EXPRESS5800/140Hb Service Manual page 21

This server system is designed for minimum downtime. To this end, the server includes
or has the option to include the following:
Chassis that supports up to three power supplies (two are standard power supplies).
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An additional power supply can be added to provide redundant power (i.e., the
system will continue to operate with a single power supply failure).
Self-contained power supplies that can be easily installed or removed from the back
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of the chassis. If optional power system redundancy is installed, the power supply
units are then hot-swappable and can be easily installed or removed from the back of
the chassis without turning the system power off.
Modular fan units that can be easily installed or removed from the side of the tower-
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based system or from the top of the rack-mount system. Each modular fan unit
contains three fans for effective cooling.
Cooling system redundancy where the system will continue to operate in the event of
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a fan failure or having cabinet temperatures approaching the threshold limit, the
redundant fans will switch to maximum operating speed.
SCSI drive bays accessible from the front of the chassis.
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Hot-swap SCSI disk drive backplane; a failed drive can be removed and replaced
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with a new drive without system power being turned off (if an optional Redundant
Array of Independent Disks (RAID) controller is installed.)
High degree of SCSI disk fault tolerance and advanced disk array management
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features through the use of RAID technology, if an optional RAID controller is
installed.
Hardware monitors (temperature and voltage) and software monitors to indicate
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failures.
Easy access to all parts for service.
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As application requirements increase, you can expand your server system with
additional processors, additional memory, add-in boards and peripheral devices.
Your server system features the following major components:
Up to four high-performance Pentium III Xeon processors packaged in Single Edge
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Contact (S.E.C.) cartridges.
Up to 16 GB of ECC SDRAM four way interleaved memory.
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Eight PCI expansion slots of which six support 64 bit hot-plug PCI boards and two
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support 32 bit non-hot-plug PCI boards. The Hot-Plug PCI feature is useable only
when Operating System support is available.
Embedded PC-compatible support (serial, parallel, mouse, keyboard, diskette, IDE,
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USB, LAN, and video).
Integrated onboard ATI RAGE IIC Super Video Graphics Array (SVGA) controller
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with 4 MB of video memory.
System Overview 1-3