Explanation
D indicates that the volume on the device is to
be demounted. The control program has determined that this volume,
mounted in response to an earlier mount message, either:
- Contains labels that cannot be read due to a permanent input/output
error.
- Contains no label or nonstandard labels when standard labels were
specified.
- Contains standard labels when no labels or nonstandard labels
were specified.
- Contains labels that are written in a density other than the density
specified.
In the message text:
- dev
- The device number of the specified device.
System action
The system rewinds and unloads the tape volume.
Operator response
Demount the volume. The system will then request
that a new volume be mounted. Mount a volume with the correct density
and label type.
Start a generalized trace facility (GTF) trace,
and re-create the problem. Reply to message AHL100A with:
TRACE=SYS,USR,SLIP
On
the DD statement for the data set in error, specify:
DCB=DIAGNS=TRACE
System programmer response
If the error recurs and the program
is not in error, look at the messages in the job log for more information.
Search problem reporting data bases for a fix for the problem. If
no fix exists, contact the IBM® Support
Center. Provide the JCL, the SYSOUT output for the job, and the associated
volume.
Source
Module
Routing code
Descriptor code