Subparameter definition

bytes

Specifies the length, in bytes, of the keys used in the data set.

The number of bytes is:

0 to 255 for non-VSAM data sets. The key length must be less than or equal to the record length.
Note: Use only 0 for a member of a partitioned data set extended (PDSE). Use 0 or 8 to perform input operations on the directory of a PDSE.
1 to 255 for VSAM key-sequenced (RECORG=KS) data sets. A key length must be specified, either explicitly with the KEYLEN or LIKE parameter, or in the data class for the data set. The key length must be less than the record length.