Appendix I: Glossary
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SRAM (Static RAM): unlike DRAM, this type of RAM does not need to be refreshed in order to
prevent data loss. Thus, it is faster and more expensive.
SSI (Server System Infrastructure): an industry initiative intended to provide ready-to-use design
specifications for common server hardware elements (chassis, power supplies, and racks) to
promote and support server industry growth.
Standby mode: in this mode, the video and hard drives shut down; all other devices continue to
operate normally.
Striping: see RAID
UltraDMA-33/66/100: a fast version of the old DMA channel. UltraDMA is also called UltraATA.
Without proper UltraDMA controller, your system cannot take advantage of higher data transfer
rates of the new UltraDMA/UltraATA hard drives.
USB (Universal Serial Bus): a versatile port. This one port type can function as a serial, parallel,
mouse, keyboard or joystick port. It is fast enough to support video transfer, and is capable of
supporting up to 127 daisy-chained peripheral devices.
VGA (Video Graphics Array): the PC video display standard
V-SYNC: controls the vertical scanning properties of the monitor.
ZCR: Zero Channel RAID. PCI card that allows a RAID card to use the onboard SCSI chip, thus
lowering cost of RAID solution
ZIF Socket (Zero Insertion Force socket): these sockets make it possible to insert CPUs without
damaging the sensitive CPU pins. The CPU is lightly placed in an open ZIF socket, and a lever is
pulled down. This shift the processor over and down, guiding into the board and locking it into place.
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