Tandberg Data SLR7-140 PROGRAMMER Manual page 89

IDENTIFY
BIT 7
Idfy
INITIATOR
DETECTED ERROR
MESSAGE PARITY
ERROR
MESSAGE REJECT
NO OPERATION
Tandberg Data
The IDENTIFY message (see the table below) is sent by
the Initiator to the Drive to establish an I T L nexus.
It may also grant the privilege of disconnecting.
6 5
DscP
Table 6-3:
Idfy The Identify bit is always set in the IDENTIFY
message.
DscP A
Disconnect
that the Initiator has granted the Drive the
privilege of disconnecting. A DscP-bit of zero
means that the Drive will not disconnect.
LUN
The Logical Unit Number field should be set to
zero because the Drive supports only Logical
Unit 0.
The Initiator may send this message to the Drive to
inform that an error has been detected in the Initiator.
The source of
previous activities on the bus or may be internal to the
initiator and unrelated to any previous activities on
the bus. The drive generally responds to an INITIATOR
DETECTED ERROR message by retrying the last phase. (i.e.
by first going back to the previous phase and then by
transferring the
section 7.5 for details about how the drive responds to
an INITIATOR DETECTED ERROR message received after a
Status- or Data In phase.
The Initiator may send this message to the Drive to
inform that the last transferred message had a parity
error. If the previous phase was a MESSAGE IN, the Drive
will go back to the MESSAGE IN phase and the previous
Message byte will be transferred once more. If a MESSAGE
PARITY ERROR message is received when no message in has
been sent, the Drive goes to the BUS FREE phase.
The Initiator may send this message to the Drive to
indicate that the
Drive was inappropriate or not implemented (see also
section 6.4).
This message will simply be ignored.
6-4 Tandberg SLR Product Line SCSI Functional Specifications
4 3
LUN
The IDENTIFY Message
Privilege
the error may
same information
last message
Message System
2 1
bit of one specifies
either be related
once more).
transferred from
0
to
See
the