Recovering from I/O Errors
Note that files created on a virtual3800 can print on any real spooling device sup
ported by VM/SP. However, if a file that was created on a virtual3800 is printed
on another real printer (for example, a1403 or a 3211) all 3800 unique control
information is ignored by the real printer. Further, while print lines of204 bytes
are allowed by the3800, lines will be truncated if printed on a real printer with a
smaller maximum line length (for example, a1403 or a 3211).
When anI/O error occurs while a virtual 3800 spool file is printing on a real 3800, the VM/SP operator can specify the BACKSP AC command with the FILE param
eter to recover from the error. The BACKSP AC command with the FILE parame
ter restarts the spool file at the beginning and reloads the real3800 with the control
information originally specified in the SETPRT command.
Displaying Control Information
The CPQUERY command enables G-, B-, and D-privilege users to display the
names of the character arrangement tables, copy modifications, and FCB currently
in effect for a spool file or virtual printer. In addition, theQUERY command dis
plays the characteristics of the virtual3800 that were established when the virtual
device was defined. Finally, the user can determine where3800 load commands
are found in a file (not at all, at the beginning, or throughout).
The VM/SP operator can use theQUERY command to determine the image
library and form loaded on the real3800. Further, the VM/SP operator can
determine which virtual3800 spool files are being accepted for printing by the real
printer: those containing no3800 load commands, those with 3800 load com
mands only at the beginning, or those with3800 load commands throughout (as
long as the class andFORMS match). The VM/SP operator specifies on the CP
START command which spool files the real3800 accepts for printing.
IBM3800 Printing Subsystem 299
Note that files created on a virtual
ported by VM/SP. However, if a file that was created on a virtual
on another real printer (for example, a
information is ignored by the real printer. Further, while print lines of
are allowed by the
smaller maximum line length (for example, a
When an
eter to recover from the error. The BACKSP AC command with the FILE parame
ter restarts the spool file at the beginning and reloads the real
information originally specified in the SETPRT command.
Displaying Control Information
The CP
names of the character arrangement tables, copy modifications, and FCB currently
in effect for a spool file or virtual printer. In addition, the
plays the characteristics of the virtual
device was defined. Finally, the user can determine where
are found in a file (not at all, at the beginning, or throughout).
The VM/SP operator can use the
library and form loaded on the real
determine which virtual
printer: those containing no
mands only at the beginning, or those with
long as the class and
START command which spool files the real
IBM