IBM Z and LinuxONE IBM Z

  • 1.  Users of a ZFS file system in a SYSPLEX

    Posted Tue February 20, 2024 10:26 AM

    I have a file system that should only have been used by me and is mounted in the sysplex root on a mountpoint.   I can not unmount it and I have tried drain , immediate, force  and nothing will allow unmounts. 



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    Scott Fashimpaur
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  • 2.  RE: Users of a ZFS file system in a SYSPLEX

    IBM Champion
    Posted Tue February 20, 2024 11:19 AM

    Hey Scott,

    What error messages are you seeing?  Anything from USS/zFS in any logs?

    Scott



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    Scott Fagen
    Mainframe Evangelist
    CDW
    www.cdw.com/content/cdw/en/solutions/ibm-zsystems.html
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  • 3.  RE: Users of a ZFS file system in a SYSPLEX

    Posted Wed February 21, 2024 08:30 AM

    If you are mounted to the SYSPLEX root, you may not be able to unmount if the root is in Read/Only mode. In that case, you will need to change the root temporarily to Read/Write to perform the unmount. 

    The other possibility is if another file is mounted off your mount point.  You can use the z/OS command D OMVS,F to check for files that might be mounted off of your path.  You would have to unmount any files connected to your path before trying to unmount the main file.



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    Arthur Zeigler
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  • 4.  RE: Users of a ZFS file system in a SYSPLEX

    IBM Champion
    Posted Wed February 21, 2024 09:53 AM

    IBM provided the ZLSOF command, found in SYS1.SBPXEXEC, which hopefully is in your SYSPROC or SYSEXEC concatenation. Use it from TSO/ISPF to view all in use filesystems and you can see who is using the one you're interested in.

    You can also issue the zlsof command from OMVS or a shell interface.

    You something like 

    zlsof | grep xxx.ZFS

    where xxx.ZFS is the filesystem you are trying to unmount.

    hope this helps



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    Lionel B. Dyck <><
    IBM z Systems Champion
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