Command Descriptor Block; Exception Handling; Phase Sequencing - Tandberg Data SLR7-140 PROGRAMMER Manual

BYTE BIT 7
00 Operation Code 16h
01 Logical Unit Number (LUN)
02 Reservation Identification
03 RESERVED
04 RESERVED
05 Control Byte
Table 24-1:
3RD
3RD Party ID
Extent
Reservation
Identification
<sequence 1>
<sequence 2>
Tandberg Data

24.2. Command Descriptor Block

6 5
RESERVE Command Descriptor Block
If the third-party (3RD) bit is zero, the third-party
reservation option is not requested. If the 3RD bit is
one, the Drive will be reserved for the SCSI device
specified in the third-party device ID field (3RD Party
ID).
This field specifies the ID of the third-party device.
The Extent bit must be set to zero (extent reservation
is not supported).
The Reservation
zero.

24.3. Exception Handling

See sections on Error Conditions For All Commands and
Deferred Errors.
If the third party (3RD) bit is one and the third party
ID (3RD Party ID)
RESERVE command will be terminated with CHECK CONDITION
status. The Error Code will be set to I

24.4. Phase Sequencing

In this section the possible SCSI-bus phase sequences
during execution of the command are described. Section
3.2.1 has more details about the generic phases in the
brackets.
:= <initiator-part> <message-out> <command> <disconnect> <reconnect>
<completed>
The Drive will
transferred. The Drive will reconnect and then transfer
status.
:= <initiator-part> <message-out> <command> <completed>
This sequence will be used when the command is executed
and the Initiator does not allow disconnection.
24-2 Tandberg SLR Product Line SCSI Functional Specifications
4 3
3RD 3RD Party ID
Identification field
is equal to
disconnect when
Reserve
2 1
Extent
must be set
the Drive's ID,
CDB.
NVALID FIELD IN
the CDB has
0
to
the
been