NEC Express5800 series User Manual
Also see for NEC Express5800 Series: User guideUser guideUser guideUser guideConfiguration guide
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Contents
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18 System OverviewSAF-TE LOGICNOTE: SAF-TE Logic is in systems that include the hot-swap SCSIdisk drive cage. SAF-TE Logic is not available in systems that includethe standard SCSI disk drive cage.The SCSI backplane includes SAF-TE (SCSI Accessed Fault Tolerant Enclosure) logic thatprovides 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 SCSIbus. Disk drives, power supplies, cooling fans, and temperature are continually monitored andthe conditions then reported over the SCSI bus to the system. When used with RAIDmanagement software the user can be alerted of impending or imminent disk conditionsrequiring attention. This allows the user to react to conditions that could normally gounnoticed until data loss.SYSTEM BOARD FEATURESThe following subsections describe the system board major components.ProcessorThe system board accommodates one or two Intel Xeon processors with 512K cache in theINT3/FCPGA socket package. This processor uses the .13 micron technology and offersadvanced performance. The processor external interface operates at a maximum of 400 MHz.MemoryThe system board contains six 168-pin DIMM slots each supporting 72-bit ECC (64-bit mainmemory plus ECC) registered SDRAM DIMMs (DDR-266 compatible). Memory is two-wayinterleaved 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 thetype, size, and speed of the installed DIMMs, and reports memory size and allocation to theserver via configuration registers.NOTE: Use DIMMs that have been tested for compatibility with theserver board.Contact your sales representative or dealer for a current list ofapproved memory modules.PCI Riser SlotsThe 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 |
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