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

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Tandberg Data

11.3. Exception Handling

See the sections on Error Conditions For All Commands,
Deferred Errors and Error Conditions For Media Access
Commands.
If the BT bit is set to one and the loaded medium is a
SLRtape140 to SLRtape7
command will be terminated with CHECK CONDITION status.
The Error Code will be set to Invalid field in CDB.
If the CP bit is set to one and the loaded medium is an
SLR5 or DC9250
terminated with CHECK CONDITION status. The Error Code
will be set to I
NVALID FIELD IN
If the IMM bit is not set to zero, the LOCATE command
will be terminated
Error Code will be set to I
If the number found in the Partition field is not in the
legal range (refer to the partition section of this
chapter), then
CONDITION status. The Error Code will be set to I
CDB. The logical tape position will not change.
FIELD IN
If the Drive is
inserted cartridge, the cartridge is assumed to be blank
and the LOCATE command will be terminated with CHECK
CONDITION. The Error code will be set to E
D or R
ETECTED ECORDED ENTITY NOT FOUND
If the specified location can not be found on the tape,
the Drive will terminate the LOCATE command with CHECK
CONDITION status. The Error Code will be set to E
.
DATA DETECTED
A CHECK CONDITION caused by early termination of any
SPACE command never results in a negative value in the
Information Bytes (the residual count) returned by the
REQUEST SENSE command.

11.4. Phase Sequencing

In this section the possible SCSI-bus phase sequences
during execution of the command are described. Section
3.2 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 when the specified
block has been located (or an error has been detected).
11-3 Tandberg SLR Product Line SCSI Functional Specifications
or SLR32,
medium the LOCATE
CDB.
with CHECK
NVALID FIELD IN
the LOCATE command
not able to
.
disconnect when
medium, the
command will
CONDITION status.
CDB.
will return
find any data on
-
ND
the CDB has
Locate
LOCATE
be
The
CHECK
NVALID
the
D
OF ATA
ND OF
been