> Q). It says "The Modify Function Cannot Be Performed". Besides turning on > SYSPLEX=YES, how can I get BPXOINIT to do a FILESYS=DISPLAY? Yes, I can work > with "D OMVS,F" for Filesystems, but the RedBook on z/OS V1R13 Implementation > shows that bpxoinit can tell me the UID and the OWNER. Excerpt from the MVS System Commands book: DISPLAY or D Display the type BPXMCDS couple data set information relating to the shared file system file system. D is an alias of DISPLAY. z/OS UNIX Services do not use a couple data set if you run with SYSPLEX=NO. It seems to be that the information you're looking for is retrieved from the CDS. Specifically, the term OWNER denotes the z/OS instance that is the system that is currently responsible for the mounted file system. Ownership can be transferred to another system in the sysplex, either if the system is shutdown, or by command. Ownership in this sense does not apply with SYSPLEX=NO. You can mount a files sytem in R/W mode on one system only and this is also the owner. If the "D OMVS,F..." answers your request, this system is automatically the owner. A file system can be mounted in R/O mode on multiple systems concurrently, but each system is owning its own mount. They do not talk to each other regarding file system activity. -- Peter Hunkeler
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