Starting zFS
zFS is started by z/OS UNIX, based on the FILESYSTYPE
statement for zFS in the BPXPRMxx parmlib member. Beginning in z/OS
V2R2, if there is no ASNAME keyword on the FILESYSTYPE statement,
zFS is started inside the OMVS address space (the address space used
by z/OS UNIX). If there is an ASNAME keyword, zFS is started in its
own colony address space. 
Requirement: Before
zFS can start in its own colony address space, a ZFS PROC must be
available.
Before
zFS can start in its own colony address space, a ZFS PROC must be
available.zFS can be started at IPL if the BPXPRMxx parmlib member is in the IEASYSxx parmlib member's OMVS=(xx,yy) list. To start it later, use the SETOMVS RESET=(xx) operator command.