System Options under z/OS

FILESYSTEM= System Option: z/OS

Specifies the default file system used when the filename is ambiguous.

Default:	MVS
Valid in:	configuration file, SAS invocation, OPTIONS statement, OPTIONS window
Category:	File Control: EXTFILES
PROC OPTIONS GROUP=	EXTFILES
z/OS specifics:	all

Syntax

FILESYSTEM=MVS | HFS

MVS: specifies that the filesystem is native z/OS, which includes partitioned data sets (PDS, PDSE).
HFS: specifies the UNIX file system (UFS).

The FILESYSTEM= system option specifies the file system that is used when the physical filename is valid in both file systems. For example:

options filesystem='HFS';

/* resolves to a UNIX file system */
/* path, such as /homedir/hfs.file */

filename myhfs 'hfs.file';