NEC Express5800/120Rf-1, Руководство пользователя

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General Description 2-17
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 64-bit Intel® Xeon® processors with 1MB/2MB cache
in the FC-mPGA4 socket package. This processor uses the 90 nano technology and offers advanced
performance.
Memory
The system board contains six 240-pin DIMM slots each supporting 72-bit ECC (64-bit main
memory plus ECC) registered SDRAM DIMMs (DDR2 400 compatible). Memory is two-way
interleaved and partitioned in three groups. You may install a minimum of 1 GB (512 MB × 2) and
as much as 16 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.
NOTE: Use DIMMs that have been tested for compatibility with the
server board.
Contact your sales representative or dealer for a current list of approved
memory modules.