Restore pointers (init ¨ targ), Save data pointer (init ¨ targ), Synchronous data transfer request – FUJITSU C150-E049-02EN User Manual
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M3099GX/GH OEM Manual
3-107
INTERFACE
RESTORE POINTERS (Init
←
Targ)
The RESTORE POINTERS message is sent from a target to direct
the initiator to copy the most recently saved command, data, and
status pointers for the I/O process to the corresponding current
pointers. The command and status pointers shall be restored to the
value at the beginnings of the data area in the absence of SAVE
DATA POINTER message or to the value at the point at which the
last SAVE DATA POINTER message occurred for that nexus.
This scanner sends this message only when received a INITIATOR
DETECTED ERROR during image data transfer.
SAVE DATA POINTER (Init
←
Targ)
The SAVE DATA POINTER message is sent from a target to direct
the initiator to copy the current data pointer to the saved data
pointer for the current I/O process.(ANSI SCSI-2 6.4 for a
definition of pointers.)
SYNCHRONOUS DATA TRANSFER REQUEST
Table 3.87 SYNCHRONOUS DATA TRANSFER REQUEST
Bit
Byte
0
1
2
3
4
7
6
5
3
2
1
0
Extended message (01h)
Extended message length (03h)
SYNCHRONOUS DATA TRANSFER REQUEST code (01h)
Transfer Period Factor
REQ/ACK Offset
4
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