z/VM: CP Commands and Utilities Reference - z/VM - IBM

If either of the following conditions occurs, the tape drive enters the mount-pending
state and response 5 is issued:
v On SPXTAPE DUMP, if the output tape fills before all the files selected on the
command are written
v On SPXTAPE LOAD or SCAN with the RUN disposition, when SPXTAPE rewinds
and unloads the tape after reading all the selected data.
You can either continue or end the SPXTAPE operation. See Response 5 (1472).
If all drives enter the mount-pending state and you take no action, the command
remains dormant.
Action Taken on Error Conditions
The following sections summarize the action taken by SPXTAPE when various error
conditions are encountered. Error messages are written in the command summary
log.
I/O Error during DUMP while Reading a File: If an I/O error occurs during an
SPXTAPE DUMP operation while reading a file from the spooling system:
1. The file is placed in system hold status.
2. The command continues with other selected files.
I/O Error during DUMP while Writing a File: If an I/O error occurs during an
SPXTAPE DUMP operation while writing a file to tape:
1. The tape is rewound and unloaded.
2. The tape drive is placed in the mount-pending state.
SPXTAPE
3. The command continues by reprocessing all the files that were dumped to the
volume that has the error. The files are dumped again, either to other active
drives for this command (if any) or to this drive when a new tape is mounted.
I/O Error during LOAD or SCAN while Reading a File: If an I/O error occurs during
an SPXTAPE LOAD or SCAN operation while reading a file from tape:
1. SPXTAPE tries to find the beginning of the next file on the tape by reading
blocks until either a block is read without error or 10 consecutive bad blocks
have been skipped.
2. If SPXTAPE finds a good block, the command continues. If SPXTAPE
encounters 10 consecutive bad blocks, the tape is positioned according to the
disposition specified on the command:
v For LEAVE, the tape remains positioned after the last bad block. Response 4
is issued. The volume log indicates which files were successfully loaded or
scanned. If this is the last or only active tape drive, the command completes
with response 3. If the tape is a multiple dump tape (created by SPXTAPE
DUMP with the LEAVE disposition), you can position it with the CMS TAPE
command if you want to try loading or scanning the remaining files on the
tape.
v For REW, the tape rewinds but does not unload. Response 4 is issued. The
volume log indicates which files were successfully loaded or scanned. If this
is the last or only active tape drive, the command completes with response 3.
v For RUN, the tape rewinds and unloads. Response 5 is issued. The volume
log indicates which files were successfully loaded or scanned. You can mount
another tape on this drive; if one or more other drives are active, you can do
Chapter 2. CP Commands 1477