Seagate Ultra 320 User Manual

Page 179

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Parallel SCSI Interface Product Manual, Rev. A

165

multidrop 7
multimode

SCSI bus signal 15

multimode I/O circuits 15
multimode single-ended 7
multiple initiator 14
multiple initiators 3
multiple target 14

N

NACA. see Normal Auto Contingent Allegiance
negated edge 6
negotiate 40
negotiation 40
negotiation message sequences 49
nexus 6, 8
no operation message 91
non-recoverable error 9
non-volatile 7
normal auto contingent allegiance 137
normal auto contingent allegiance bit 143

O

object 6, 8
objects, cooperating 9
obsolete 11
odd parity 8
one-byte message 84
operating definition 149
operation

I/O 7

operation code 131, 132
option 11

implementation 6
protocol 8

option actualization 6
ordered message 104
ordered task queue tag message 148
output

SCSI bus signal 15

overlapped command 143
overlapped commands attempted 143, 150

P

P_CRCA signals 34
P1 16
paced 37
paced DT data transfers 68
paced transfer 1, 8, 14, 37, 44, 68

on a SCSI bus 36

pacing 8
pacing transfer

at end of training pattern 72
with no training pattern 72

packetized 8

command structure 131

Packetized Failures

SPI status information unit 127, 128

Packetized Failures List Length

SPI status information unit 127

Packetized Failures Valid

SPI status information unit 127, 128

pad field 8
pad information 8
parallel protocol request 8
parallel protocol request message 92
parallel transfer 6
parameter

invalid 132
low-level hardware 149

parameter list length 136
parameter value

rounding 149

parity 158

odd 8

parity bit 8
partitions 2
PCOMP_EN 47
pCRC byte 5
pCRC field 8, 38
pCRC information 8
pCRC protection 8
pCRC Receive hold time 28
pCRC Receive setup time 28
pCRC Transmit hold time 28
pCRC Transmit setup time 28
peer entities 8
peer-to-peer protocol service 8
pending task 8
Persistent Reserve Out command 143
physical connect 6
physical disconnection delay 29
physical interconnect 8
physical interface

characteristics 12

physical reconnect 8
physical reconnection 8
pointer 109
port 8
power on to selection 29
PPR 40
precompensation 47
preempt and clear action 143
procedure 8

SCSI 9

protection code 154, 157
protection code checking

disabling 158
enabling 158

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