Deferred Errors - Tandberg Data SLR7-140 PROGRAMMER Manual

Reserved Field
Unit Attention
Unsupported LUN
Append Failure
Tandberg Data
Every command will be terminated with CHECK CONDITION if
one or more reserved bit, field, or byte is not zero.
The Error Code will be set to I
I
NVALID FIELD IN PARAMETER LIST
Each command except INQUIRY and REQUEST SENSE will be
terminated with CHECK CONDITION status due to a Unit
Attention Condition.
The Error Codes are:
C C
LEANING ARTRIDGE
L
OG PARAMETERS CHANGED
M
ICROCODE HAS BEEN CHANGED
M
ODE PARAMETERS CHANGED
N
OT READY TO READY TRANSITION
P / R
OWER ON ESET OCCURRED
SCSI-
BUS RESET OCCURRED
T C
HRESHOLD ONDITION
The Drive supports only Logical Unit 0. The LUN field in
the Command Descriptor Block and the IDENTIFY message
must always be set to zero. All commands except INQUIRY
and REQUEST SENSE will terminate with CHECK CONDITION if
the LUN field is not set to zero. The Error Code will be
set to L
OGICAL UNIT NOT SUPPORTED
7.3.

Deferred Errors

A deferred error is an error that occurs on an Immediate
or Buffered type
terminated with GOOD status and before the next command
has started execution. If the error occurs after the
next command has started execution, the error will be
reported as a
command.
All commands except INQUIRY and REQUEST SENSE may be
terminated due to deferred errors.
When a Deferred Error has been detected in the Drive,
the first Initiator to access the Drive will have its
command terminated with CHECK CONDITION even if this
Initiator is different from the Initiator that issued
the command that failed. To avoid this situation an
Initiator may use the RESERVE command to have exclusive
access and then the WRITE FILEMARKS (with filemark count
equal to zero if necessary) to synchronize with the
Drive before letting other Initiators access the Drive
again.
Note:
The VADD bit will not be set and the Information Bytes
will not be valid
detected.
The Drive was not able to append new data to data
already existing on the tape. This is a fatal error.
Unwritten data and filemarks may be left in the data
buffer. See also
Handling for the WRITE and WRITE FILEMARKS commands. The
Error Code will be set to W
7-6 Tandberg SLR Product Line SCSI Functional Specifications
.
E
JECTED
,
MEDIUM MAY HAVE CHANGED
M
ET
.
command after
normal non-deferred
when a Deferred
the section
RITE APPEND POSITION ERROR
General Exception Handling
CDB or
NVALID FIELD IN
that command
error for
Error has
on General Exception
has
that
been