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

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Tandberg Data

14.4. Exception Handling

See sections on Error Conditions For All Commands and
Deferred Errors.
If the MODE SELECT command, for any reason, returns with
CHECK CONDITION status, no parameters will have been
changed.
If the PF bit is not set to one and the parameter list
contains one or more pages, the MODE SELECT command will
return CHECK CONDITION status. No parameter data will be
transferred. The Error Code will be set to P
.
LENGTH ERROR
A Parameter List Length that results in truncation of
any Descriptor, Header or Page of parameters will cause
the Drive to terminate the command with CHECK CONDITION
status. The Error Code will be set to P
.
ERROR
If a Page Code in the Parameter List is not in the legal
set of values, the Drive will terminate the MODE SELECT
command with CHECK CONDITION status. The Error Code will
be set to I
NVALID FIELD IN PARAMETER LIST
If the Page Length in any page is wrong, the Drive will
terminate the MODE SELECT command with CHECK CONDITION
status. The Error Code will be set to I
.
PARAMETER LIST
If any field in the Parameter List is set to an illegal
value, the Drive will terminate the MODE SELECT command
with CHECK CONDITION status. The Error Code will be set
I
NVALID FIELD IN PARAMETER LIST
If any non-changeable pages or any non-changeable fields
in any page are specified for change, the Drive will
terminate the MODE SELECT command with CHECK CONDITION
status. The Error Code will be set to I
.
PARAMETER LIST
If any non-savable pages are specified when the SP bit
is set, the Drive will terminate the MODE SELECT command
with CHECK CONDITION status. The Error Code will be set
I
NVALID FIELD IN PARAMETER LIST

14.5. 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>
<data-out><disconnect><reconnect> <completed>
The Drive will
transferred. The Drive will then reconnect and transfer
the mode parameters. When the parameters are transferred
the Drive will disconnect again. Finally, when the mode
parameters are handled, status is reported.
14-38 Tandberg SLR Product Line SCSI Functional Specifications
.
.
.
disconnect when
Mode Select
ARAMETER LIST
ARAMETER LIST LENGTH
NVALID FIELD IN
NVALID FIELD IN
the CDB has been