HP storageworks HSG80 Reference Manual page 231

Glossary
SCSI bus signal converter
(1) A device used to interface between the subsystem and a peripheral device unable to be
mounted directly into the SBB shelf of the subsystem. (2) A device used to connect a
differential SCSI bus to a single-ended SCSI bus. (3) A device used to extend the length of a
differential or single-ended SCSI bus.
Also called adapter. See also DWZZA, DWZZB, DWZZC, and I/O module.
SCSI device
(1) A host computer adapter, a peripheral controller, or an intelligent peripheral that can be
attached to the SCSI bus. (2) Any physical unit that can communicate on a SCSI bus.
SCSI device ID number
A bit-significant representation of the SCSI address referring to one of the signal lines,
numbered 0 through 7 for an 8-bit bus, or 0 through 15 for a 16-bit bus. See also target ID
number.
SCSI ID number
The representation of the SCSI address that refers to one of the signal lines numbered 0
through 15.
SCSI port
(1) Software: The channel controlling communications to and from a specific SCSI bus in the
system. (2) Hardware: The name of the logical socket at the back of the system unit to which a
SCSI device is connected.
SCSI-A cable
A 50-conductor (25 twisted-pair) cable generally used for single-ended, SCSI-bus
connections.
SCSI-P cable
A 68-conductor (34 twisted-pair) cable generally used for differential bus connections.
selective storage presentation
Selective Storage presentation is a feature of the HSG80 controller that enables the user to
control the allocation of storage space and shared access to storage across multiple hosts. This
is also known as "Restricting Host Access."
serial transmission
A method transmission in which each bit of information is sent sequentially on a single
channel rather than simultaneously as in parallel transmission.
HSG80 Array Controller V8.7 Command Line Interface Reference Guide Glossary–23