Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

Glossary
UltraSCSI RAID Enclosure Glossary–15
StorageWorks building block
See
SBB
.
supported device
(1) A device that has been fully evaluated in an “approved”
StorageWorks configuration (that is, shelf, cabinet, power supply,
cabling, and so forth) and is in complete compliance with
country-specific standards (for example, FCC, CE–Mark, CSA, TÜV,
VDE, and so forth) and with all Compaq standards. (2) A device
supported by an array controller or host operating system.
target
A SCSI device that performs an operation requested by an initiator.
target ID
See
SCSI bus ID
.
terminators
The interconnect components that form the ends of the transmission
lines in bus segments. A
SCSI domain
must have at least one
segment and therefore at least two terminators. The terminators
ensure that inactive SCSI bus signals are in a known state.
There are two basic types of terminators—active and passive:
• Single-ended bus segments use active, linear terminators
• Differential bus segments use passive (linear totem pole)
terminators except for special cases where the electrical
transmission lines are very short and only one termination or
pull-up is required.
terminator connector
Any connector physically part of a
terminator
. It is not uncommon
for terminators to have both stub and bus path connectors.
TERMPOWER
Termination power. The electrical current power required for SCSI
bus terminators. This power can be supplied by an external SCSI bus,
the shelf power supply, or an ac-to-dc power converter.