System Board Features - NEC Express5800 series User Manual

SAF-TE LOGIC
NOTE: SAF-TE Logic is in systems that include the hot-swap SCSI
disk drive cage. SAF-TE Logic is not available in systems that include
the standard SCSI disk drive cage.
The SCSI backplane includes SAF-TE (SCSI Accessed Fault Tolerant Enclosure) logic that
provides an interface to the disk subsystem that supports status signals, hot swapping drives,
and enclosure monitoring.
The transport mechanism for the standardized alert detection and status reporting is the SCSI
bus. Disk drives, power supplies, cooling fans, and temperature are continually monitored and
the conditions then reported over the SCSI bus to the system. When used with RAID
management software the user can be alerted of impending or imminent disk conditions
requiring attention. This allows the user to react to conditions that could normally go
unnoticed until data loss.

SYSTEM BOARD FEATURES

The following subsections describe the system board major components.
Processor
The system board accommodates one or two Intel Xeon processors with 512K cache in the
INT3/FCPGA socket package. This processor uses the .13 micron technology and offers
advanced performance. The processor external interface operates at a maximum of 400 MHz.
Memory
The system board contains six 168-pin DIMM slots each supporting 72-bit ECC (64-bit main
memory plus ECC) registered SDRAM DIMMs (DDR-266 compatible). Memory is two-way
interleaved and partitioned in three banks. You may install a minimum of 256 MB (128MB × 2)
and as much as 6 GB.
The controller automatically detects, sizes, and initializes the memory array, depending on the
type, size, and speed of the installed DIMMs, and reports memory size and allocation to the
server via configuration registers.
Use DIMMs that have been tested for compatibility with the
NOTE:
server board.
Contact your sales representative or dealer for a current list of
approved memory modules.
PCI Riser Slots
The motherboard has two PCI riser slots. Riser slot B provides the following features:
Bus speed up to 100 MHz
184 pin, 5 volt keyed, 64-bit expansion slot connector
18 System Overview