CA Dynam for VSE User Guide

Changing File Characteristics
NOTRUNC
RELEASE
RUN|NORWD
SB|DB
SKR
SL|UL
Ignores TRUNC requests for this file. For more
information about TRUNC macro, see the IBM Supervisor
And I/O Macro manual.
Releases the logical assignment for the file at close (only
for temporary programmer logical units). Default: No
release of the assignment
Specifies whether to rewind and unload tape at close.
Default: Tape rewound at close
Single or double buffering for this file. Default: Buffering
technique specified by the user program
Skips tape rewind at open. Default: Tape rewound at
open
Forces standard label (SL) or unlabeled (UL) tape
processing. Default: Processing specified in program
IGNore
Signals that ignore processing is in effect. The file is not opened. For input, an
EOF (end-of-file record) will be returned at the first GET/READ. For output, all
PUTs/WRITEs will be discarded.
CA Dynam/FI IGNORE processing is an alternative to the IBM 'ASSGN IGN'
facility. If, in normal processing, the logical unit derived by DYNAM/FI is
assigned 'IGN', but the TLBL has the CA Dynam/FI 'IGN' option, CA Dynam/FI
processing will prevail; i.e, the IBM facility will be ignored.
This option is not supported for CA SORT input/output files.
LRECL=nnnnn
Defines the logical record length for the file.
Default: Record length defined in the Catalog or else record length in the
user's program
NODISK
NOFI
RECFM=xx
Prevents the operator from switching to DISK for this generation of the tape
file. Overrides the Catalog specification of FI for this data set.
Ignores CA Dynam/FI processing for this file (used with programs such as
DITTO, which modifies its DTF after OPEN processing is complete).
Specifies the record format for the file. Record formats supported follow:
F
FB
V
Fixed
Fixed-blocked
Variable
Chapter 6: Controlling File Independence 6–13