Seagate Ultra 320 manual SPI-3 to SCSI-2 terminology mapping, SPI-3 equivalent term SCSI-2 term

c.A SCSI device being removed shall maintain its power ground and logic ground prior to, during, and for at least 1 ms after the disconnection of any device connector contact from the SCSI bus.

d.The SCSI device being removed or inserted shall employ transceivers that conform to the applicable requirements in ANSI SPI-5 specification, T10/1525D, sections 7.2.2 and 7.3.5.3 for glitch-free powering on and off. The SCSI device shall maintain the high-impedance state at the device connector contacts during a power cycle until the transceivers are enabled. Power cycling includes on board TERMPWR cycling caused by plugging, and SCSI device power cycling caused by plugging and switching.

Note. Any on-board switchable terminators as well as SCSI device transceivers may affect the impedance state at the device connector contacts.

e.The SCSI device power may be simultaneously switched with the SCSI bus contacts if the power distri- bution system is able to maintain adequate power stability to other SCSI devices during the transition and the grounding requirements in items (b) and (c) above are met.

f.The SCSI bus termination shall be external to the SCSI device being inserted or removed.

g.Initiation or resumption of I/O processes for a newly inserted or removed SCSI device is vendor-specific but shall not occur sooner than 200 milliseconds after the completion of the insertion or removal event.

h.Bypassing capacitors connecting to the TERMPWR line on the SCSI device being inserted or removed shall not exceed 10 mF. For single-ended applications, SCSI bus terminations shall use voltage regula- tion.

Note. In a multimode environment, any insertion or removal that changes the bus mode causes a transceiver mode change reset event (see Section 5.4.4).

Note. LVD SCSI devices may require more stringent system design to tolerate transients that occur during Case 4 insertion or removal.

8.5SPI-3 to SCSI-2 terminology mapping

This section contains a mapping of terminology used in SCSI-2 to the terminology used in this manual (see Table 69).

Table 69: SPI-3 to SCSI-2 terminology mapping

SPI-3 equivalent term	SCSI-2 term
abort task	abort tag
abort task set	abort
cable skew	cable skew delay
clear task set	clear queue
head of queue	head of queue tag
ordered	ordered queue tag
simple	simple queue tag
target reset	bus device reset
task	I/O process
task complete	command complete
task set	queue

160 Parallel SCSI Interface Product Manual, Rev. A