
DCB Parameter
6-16 User Reference
Connectivity Systems, Inc.—Copyright © 2006
Use Pursuant to Company Instructions
DCB Parameter
Description Use the DCB parameter to define the characteristics of the dataset. DCB
subparameters override the DSN Catalog entry on output, but not on
input.
Syntax The following provides an example of a DCB parameter syntax.
DCB=( [ BLKSIZE=x ][ ,DEN=x ][ ,DSORG=x ][ ,LRECL=x ] )
Subparameters The following provides a description of the subparameters you can use
with the DCB parameter.
Definitions The following provides definitions for the subparameters you can use
with the DCB parameter.
Subparameter Required? Valid Default
BLKSIZE No 1 to 32767 or MAX|OPT None
DEN No See DEN table (below) None
DSORG No See DSORG table (below) PS
LRECL No 1 to 32767 None
Subparameter Definition
BLKSIZE Specifies a block size and is valid for sequential datasets
only. If an integer value is used, it must be a multiple of
the LRECL value. For MAX and OPT, BIM-EPIC will
calculate the appropriate block size.
MAX causes BIM-EPIC to use full-track blocking on
disk. For tape, when using VSE/ESA 2.5 and later
releases, BIM-EPIC uses a 64K block size. For earlier
VSE releases, a block size of 32K is used.
OPT causes BIM-EPIC to use half-track blocking for
disk. For tape, when using VSE/ESA 2.5 or later
releases, BIM-EPIC uses a 32K block size. For earlier
VSE releases, a 16K block size is used.
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