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M3099GX/GH OEM Manual 3-103
INTERFACE
BUS DEVICE RESET (Init → Targ)
The BUS DEVICE RESET message is sent from an initiator to
direct a target to clear all I/O processes on that SCSI device. This
message forces a hard reset condition to the selected SCSI device.
The target shall go to the BUS FREE phase following successful
receipt of this message. This target shall create a unit attention
condition for all initiators (see ANSI SCSI-2 7.9).
COMMAND COMPLETE (Init ← Targ)
The COMMAND COMPLETE message is sent from a target to an
initiator to indicate that the execution of an I/O process has
completed and that valid status has been sent to the initiator. After
successfully sending this message, the target shall go to the BUS
FREE phase by releasing the BSY signal. The target shall consider the
message transmission to be successful when it detects the negation of
ACK for the COMMAND COMPLETE message with the ATN
signal false.
DISCONNECT (Init ← Targ)
The DISCONNECT message is sent from a target to inform an
initiator that the present connection is going to be broken (the target
plans to disconnect by releasing the BSY signal), but that a later
reconnect will be required in order to complete the current I/O
process. This message shall not cause the initiator to save the data
pointer. After successfully sending this message, the target shall go to
the BUS FREE phase by releasing the BSY signal. The target shall
consider the message transmission to be successful when it detects
the negation of the ACK signal for the DISCONNECT message
with the ATN signal false.
Targets which break data transfers into multiple connections shall
end each successful connection(except possibly the last) with a SAVE
DATA POINTER - DISCONNECT message sequence.
If the target receives the DISCONNECT message from the initiator,
the target shall respond by sending a MESSAGE REJECT message
to the initiator.
#03.pm5 98.2.22, 1:33 PM103