FUJITSU M3097G - Manual (Page 121)

(10) SAVE DATA POINTER (X©02π) : MESSAGE IN phase (target Æ initiator)
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.
(11) RESTORE POINTERS (X©03π) : MESSAGE IN phase (target Æ initiator)
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.
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