IBM System Storage TS3310 Setup And Operator Manual page 335

serializer. A device that converts a space distribution
of simultaneous states representing data into a
corresponding time sequence of states.
servo, servos. An adjective for use in qualifying some
part or aspect of a servomechanism.
servomechanism. A feedback control system in which
at least one of the system signals represents mechanical
motion.
Small Computer Systems Interface (SCSI). A
standard used by computer manufacturers for attaching
peripheral devices (such as tape drives, hard disks,
CD-ROM players, printers, and scanners) to computers
(servers). Pronounced "scuzzy". Variations of the SCSI
interface provide for faster data transmission rates than
standard serial and parallel ports (up to 160 megabytes
per second). The variations include:
v Fast/Wide SCSI: Uses a 16-bit bus, and supports data
rates of up to 20 MBps.
v SCSI-1: Uses an 8-bit bus, and supports data rates of
4 MBps.
v SCSI-2: Same as SCSI-1, but uses a 50-pin connector
instead of a 25-pin connector, and supports multiple
devices.
v Ultra SCSI: Uses an 8- or 16-bit bus, and supports
data rates of 20 or 40 MBps.
v Ultra2 SCSI: Uses an 8- or 16-bit bus and supports
data rates of 40 or 80 MBps.
v Ultra3 SCSI: Uses a 16-bit bus and supports data
rates of 80 or 160 MBps.
v Ultra160 SCSI: Uses a 16-bit bus and supports data
rates of 80 or 160 MBps.
SNS. Sense.
special feature. A feature that can be ordered to
enhance the capability, storage capacity, or performance
of a product, but is not essential for its basic work.
SR. Service representative, see also CE.
SRAM. Static random access memory.
SS. Status store.
ST. Store.
standard feature . The significant design elements of a
product that are included as part of the fundamental
product.
START. Start maintenance.
subsystem. A secondary or subordinate system,
usually capable of operating independently of, or
asynchronously with, a controlling system.
SUPP. Support.
sync. Synchronous, synchronize. Occurring with a
regular or predictable time relationship.
T
tachometer, tach. A device that emits pulses that are
used to measure/check speed or distance.
tape cartridge. A container holding magnetic tape that
can be processed without separating it from the
container.
tape void. An area in the tape in which no signal can
be detected.
TCP/IP. Transmission Control Protocol/Internet
Protocol.
TCU. Tape control unit.
TH. Thermal.
thread/load operation. A procedure that places tape
along the tape path.
TM. Tapemark.
U
UART. Universal asynchronous receiver/transmitter.
unload. Prepare the tape cartridge for removal from
the drive.
utilities. Utility programs.
utility programs. A computer program in general
support of the processes of a computer; for instance, a
diagnostic program.
uv . Under voltage.
V
VOLSER. Volume serial number.
volume. A certain portion of data, together with its
data carrier, that can be handled conveniently as a unit.
VPD. Vital product data. The information contained
within the tape drive that requires nonvolatile storage
used by functional areas of the drive, and information
required for manufacturing, RAS, and engineering.
W
word. A character string that is convenient for some
purpose to consider as an entity.
Write. Write command.
WT. world trade.
F-7
Glossary