the system configuration may vary. possible configurations include:

    1 multiple pseries 690s attached to one hardware management console (hmc)

    2 two hmcs attached to one pseries 690

    3 two hmcs jointly managing up to eight pseries 690s

    the following components make up the base configuration of the pseries 690:

    1 rack and bulk power subsystem (bpa) the bpa is the main power control unit for the pseries 690. this redundant bulk power assembly distributes power at 350 v to each drawer where conversion is made to the required chip level.

    2 processor subsystem the processor subsystem is a 17 eia-unit-high drawer. the processor subsystem contains the backplane, up to four processor modules, up to 16 l3 cache modules, up to four i/o books, up to eight memory books, and cooling blowers. the processor subsystem drawer also contains the power subsystem components used in the conversion of 350 v bulk power to the supply voltages required by the various internal components.

    several memory book sizes are available. the minimum memory requirement to operate this system is 8 gb, and the maximum amount of memory is 256 gb.

    3 media drawer the media drawer is a 1 eia-unit high drawer containing an operator panel, 1.44 mb floppy diskette drive, one scsi optical drive (either a cd-rom or a dvd-ram), signal cables, power cables, a 1 eia-unit-high 24-inch rack-mountable sheet metal enclosure, and miscellaneous mechanical hardware. three additional scsi bays are available to add optional cd-roms, dvd-rams, or 4-mm tape drives:

    – variable speed scsi-2 cd-rom drive

    – scsi dvd-ram drive

    – 4-mm internal tape drive

    4 integrated battery feature (ibf) (optional) the ibf is a 2 eia-unit-high drawer that can be added to your system. the ibf provides backup electric power in case of a power outage. you can install up to two ibfs in the base rack configuration. one additional ibf can be installed in an expansion rack.

    5 i/o drawers the i/o drawer is a 4 eia-unit-high drawer containing up to two i/o boards, up to 16 disk drives, four dasd backplanes, a midplane card, four cooling fans and two power supplies (which are independent of the bulk power assembly).

    the base rack configuration can have up to four i/o drawers with each drawer having 20 pci card slots, and more than 500 gb of storage. an expansion rack can be connected to the base system and contain additional i/o drawers and ibfs.

    if your base rack configuration contains an ibf, the space in the rack for the fourth i/o drawer in that rack is not available.however, an expansion rack allows you to add additional i/o drawers and an additional ibf.

    6 hardware management console (hmc) - the hmc consists of a display, independent processor, keyboard, and mouse. the hmc is mandatory for all systems. for more information on the use of logical partitioned systems, see the “partitioned system overview”.