Fujitsu M3097DG Oem Manual page 183

SAVE DATA POINTER (X'02') : MESSAGE IN phase (target → initiator)
(10)
This message is sent from the target to the initiator in order to save the current data pointer. The
initiator saves the current data pointer value into the saved pointer for the logical unit currently
connected.
When the disconnection is enabled by the IDENTIFY message and this scanner cannot prepare data
to be transferred in the DATA IN phase, this scanner issues the DISCONNECT message after
issuing the SAVE DATA POINTER message so that the SCSI bus is released.
Notes:
1. When no memory option is provided, this scanner does not issue the SAVE DATA POINTER
message.
2. When the required data for the READ command is less than 64 KB, this scanner does not issue
the SAVE DATA POINTER message.
RESTORE POINTERS (X'03') : MESSAGE IN phase (target → initiator)
(11)
The initiator restores the saved pointer by using this message. The initiator restores the command
data status pointer value from the saved pointer for the logical unit connected when this message is
received. The initiator stores the value into the current pointer.
Note:
This scanner issues the RESTORE POINTER message only during error recovery when the
INITIATOR DETECTED ERROR message has been received.
(12) SYNCHRONOUS DATA TRANSFER REQUEST (Extended message) Message IN/OUT Phase
(Init ↔ Targ)
The SYNCHRONOUS DATA TRANSFER REQUEST consists of 5bytes is only an extended
message by this scanner.
Bit
Byte
0
1
2
3
4
SYNCHRONOUS DATA TRANSFER REQUEST
7 6 5
Extended message (06h)
Extended message length (03h)
SYNCHRONOUS DATA TRANSFER REQUEST code (01h)
Transfer Period Factor
REQ/ACK Offset
4 3 2
A.6 Messages
1 0
Appendix A-113