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GL–17
Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide
surviving controller The controller in a dual-redundant configuration pair that serves its
companion’s devices when the companion controller fails.
synchronous Pertaining to a method of data transmission which allows each event to
operate in relation to a timing signal. See also asynchronous.
tape A storage device supporting sequential access to variable sized data records.
target (1) A SCSI device that performs an operation requested by an initiator. (2)
Designates the target identification (ID) number of the device.
Target ID number The address a bus initiator uses to connect with a bus target. Each bus target
is assigned a unique target address.
this controller The controller that is serving your current CLI session through a local or
remote terminal. See also other controller.
transfer data rate The speed at which data may be exchanged with the central processor,
expressed in thousands of bytes per second.
Ultra SCSI bus A wide, Fast-20 SCSI bus.
unit A container made accessible to a host. A unit may be created from a single
disk drive or tape drive. A unit may also be created from a more complex
container such as a RAIDset. The controller supports a maximum of 32 units
on each target. See also target and target ID number.
unwritten cached
data
Sometimes called unflushed data. See dirty data.
UPS Uninterruptible power supply. A battery-powered power supply guaranteed
to provide power to an electrical device in the event of an unexpected
interruption to the primary power supply. Uninterruptible power supplies are
usually rated by the amount of voltage supplied and the length of time the
voltage is supplied.