AHA-2740W/2742W/2744W User’s Guide
Stock Number: 510647-00, Rev. A
Page: Glossary-8
Print Spec Number: 492897-00
Current Date: 8/3/94
ECN Date: 8/9/94
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AHA-2740W/2742W/2744W User’s Guide
Glossary-8
negotiated, synchronous data
transfer parameters remain
unchanged until certain
reinitialization activities occur.
T
Tagged Queuing
A SCSI-2 feature that allows the
SCSI device to queue return data
commands in a different order
than requested by the SCSI host
adapter, thereby increasing
performance.
Target (or Target Device)
A SCSI device that performs an
operation requested by an initia-
tor. The target may be a periph-
eral device such as a disk drive
performing a service for an initi-
ator. The target may also be a
host adapter performing a
processor-type device service for
an initiator.
Termination
A physical requirement of the
SCSI bus. The devices at the
physical ends of the SCSI bus
must have terminating resistors
either installed or enabled;
devices in the middle of the bus
must have terminating resistors
either removed or disabled.
W
Wide Data Transfer
Transferring 16 bits or 2 bytes of
data at the data phase.
Wide Data Transfer Negotiation
When SCSI devices negotiate to
transfer 16-bit data at the trans-
fer rate.
Word
A 2-byte (16-bit) unit of data.
Z
Zero Latency Reads
A Method of minimizing
mechanical limitations of fixed
disk by requesting data in an
unordered sequence. The data is
reordered by the host adapter.
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