Tandberg Data
Message System
6-4
Tandberg SLR Product Line SCSI Functional Specifications
IDENTIFY
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.
BIT 7
6
5
4
3
2
1
0
Idfy
DscP
LUN
Table 6-3: The IDENTIFY Message
Idfy
T
he Identify bit is always set in the IDENTIFY
message.
DscP
A
Disconnect Privilege bit of one specifies
that the Initiator has
g
ranted the Drive the
privilege of disconnecting. A DscP-bit of
z
ero
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.
INITIATOR
DETECTED ERROR
The Initiator may send this message to the Drive to
inform that an error has been detected in the Initiator.
The source of the error may either be related to
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 same information once more). See
section 7.5 for details about how the drive responds to
an INITIATOR DETECTED ERROR message received after a
Status- or Data In phase.
MESSAGE PARITY
ERROR
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.
MESSAGE REJECT
The Initiator may send this message to the Drive to
indicate that the last message transferred from the
Drive was inappropriate or not implemented (see also
section 6.4).
NO OPERATION
This message will simply be ignored.
Содержание SLR7-140 PROGRAMMER
Страница 140: ...Tandberg Data Locate 11 4 Tandberg SLR Product Line SCSI Functional Specifications This Page Intentionally Left Blank...
Страница 282: ...Tandberg Data Read 17 10 Tandberg SLR Product Line SCSI Functional Specifications This Page Intentionally Left Blank...
Страница 334: ...Tandberg Data Space 27 8 Tandberg SLR Product Line SCSI Functional Specifications This Page Intentionally Left Blank...
Страница 340: ...Tandberg Data Verify 29 4 Tandberg SLR Product Line SCSI Functional Specifications This Page Intentionally Left Blank...
Страница 350: ...Tandberg Data Write 30 10 Tandberg SLR Product Line SCSI Functional Specifications This Page Intentionally Left Blank...