HP Array Controller HSG V8.7 Software - Manual (Page 547)

Glossary G–21
topology An interconnection scheme that allows multiple Fibre Channel ports to
communicate with each other. For example, point-to-point, Arbitrated
Loop, and switched fabric are all Fibre Channel topologies.
transfer data rate The speed at which data may be exchanged with the central processor,
expressed in thousands of bytes per second.
ULP Upper Layer Protocol.
ULP process A function executing within a Fibre Channel node which conforms to
the Upper Layer Protocol (ULP) requirements when interacting with
other ULP processes.
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 eight 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.
VHDCI Very high-density-cable interface. A 68-pin interface. Required for
Ultra-SCSI connections.
virtual terminal A software path from an operator terminal on the host to the controller’s
CLI interface, sometimes called a host console. The path can be
established via the host port on the controller (using HSZterm) or via
the maintenance port through an intermediary host.
VTDPY An abbreviation for Virtual Terminal Display Utility.