General Description 2-17SAF-TE LOGICNOTE: SAF-TE Logic is in systems that include the hot-swap SCSIdisk drive cage. SAF-TE Logic is not available in systems thatinclude the standard SCSI disk drive cage.The SCSI backplane includes SAF-TE (SCSI Accessed Fault Tolerant Enclosure) logic that providesan interface to the disk subsystem that supports status signals, hot swapping drives, and enclosuremonitoring.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 theconditions then reported over the SCSI bus to the system. When used with RAID managementsoftware 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 FEATURESThe following subsections describe the system board major components.ProcessorThe system board accommodates one or two Intel Xeon processors with 1MB cache in theINT3/FCPGA socket package. This processor uses the .13 micron technology and offers advancedperformance. The processor external interface operates at a maximum of 800 MHz.MemoryThe system board contains six 168-pin DIMM slots each supporting 72-bit ECC (64-bit mainmemory plus ECC) registered SDRAM DIMMs (DDR333 compatible). Memory is two-wayinterleaved and partitioned in three banks. You may install a minimum of 1 GB (512 MB × 2) and asmuch as 12 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 viaconfiguration registers.NOTE: Use DIMMs that have been tested for compatibility with theserver board.Contact your sales representative or dealer for a current list of approvedmemory modules.
