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RAM (Random Access Memory): technically refers to a type of memory where
any byte can be accessed without touching the adjacent data, is often used to refer
to the system’s main memory. This memory is available to any program running on
the computer.
ROM (Read-Only Memory): a storage chip which contains the BIOS; the basic
instructions required to boot the computer and start up the operating system.
SATA (Serial ATA): is an evolutionary replacement for the Parallel ATA physical
storage interface. Serial ATA is a drop-in solution in that it is compatible with today’s
software and operating systems. It will provide for systems which are easier to
design, with cables that are simpler to route and install, smaller cable connectors,
and lower voltage requirements.
SDRAM (Synchronous Dynamic RAM): called as such because it can keep two
sets of memory addresses open simultaneously. By transferring data alternately
from one set of addresses and then the other, SDRAM cuts down on the delays
associated with non-synchronous RAM, which must close one address bank before
opening the next.
Serial port: called as such because it transmits the eight bits of a byte of data
along one wire, and receives data on another single wire (that is, the data is
transmitted in serial form, one bit after another).
SCSI Interrupt Steering Logic (SISL): Architecture that allows a RAID controller,
such as AcceleRAID 150, 200 or 250, to implement RAID on a system board-
embedded SCSI bus or a set of SCSI busses. SISL: SCSI Interrupt Steering Logic
( LSI ) (only on LSI SCSI boards)
SIMM (Single In-line Memory Module): formally the most common form of RAM
for motherboards. They must be installed in pairs, and do not have the carrying
capacity or the speed of DIMM modules.
Sleep/Suspend mode: in this mode, all devices except the CPU shut down.
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