Seagate Ultra 160 Product Manual page 55

Table 11: Negotiable fields and effects of successful negotiation
Field name
PCOMP_EN
RTI
RD_STRM
WR_FLOW
Protocol
options
HOLD_MCS
QAS_REQ
DT_REQ
IU_REQ
When negotiating, the responding port shall respond with values that are a subset of the values in the originat-
ing message as indicated in Table 12 (e.g., if the originating message requests a REQ/ACK offset of 10h, the
responding message has a REQ/ACK offset field set to 10h or lower).
Table 12: Responding message requirements
Field Name
Transfer Period Factor
REQ/ACK Offset
Transfer Width Expo-
nent
PCOMP_EN
RTI
RD_STRM
WR_FLOW
Protocol
Options
HOLD_MCS
QAS_REQ
DT_REQ
IU_REQ
Parallel SCSI Interface Product Manual, Rev. A )
PPR
Negotiated
Negotiated
Negotiated
Negotiated
Negotiated
Negotiated
Negotiated
Negotiated
Response shall be
Message numerically
PPR, SDTR Greater than or equal
PPR, SDTR
PPR, WDTR
PPR
PPR
PPR
PPR
PPR
PPR
PPR
PPR
Negotiation message pair
WDTR
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Less than or equal
00h or 01h
Less than or equal
Less than or equal
Less than or equal
Less than or equal
Less than or equal
Less than or equal
Less than or equal
Less than or equal
SDTR
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
Sets to 00h
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