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How to allocate an HFS file on z/OS 390

 
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Werner Spreeuwenberg

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Joined: 24 Jul 2009
Posts: 8
Location: Netherlands

PostPosted: Wed Oct 28, 2009 2:02 pm    Post subject: How to allocate an HFS file on z/OS 390
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Can someone tell me how to allocate an HFS file on mainframe (z/OS 390 Z10 mainframe) ?

.. Or is HFS (hierarchical file system (HFS) library) only used in UNIX environments.

Thanks
Werner Spreeuwenberg
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Robert Sample

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Joined: 06 Jun 2008
Posts: 8055
Location: East Dubuque, Illinois, USA

PostPosted: Wed Oct 28, 2009 5:25 pm    Post subject:
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HFS files are mounted on Unix System Services mount points, but they must represent actual z/OS files. Sample JCL to allocate one:
Code:
//HFS01 DD DSN=OMVS.PROD.ADV,
//      SPACE=(CYL,(1650,1650)),
//      DSNTYPE=HFS,DCB=(DSORG=PO),
//      DATACLAS=DCHFS01,
//      UNIT=SYSDA,
//      DISP=(NEW,CATLG,DELETE)
where the data class and data set name depend upon site standards. Allocation of this file to a mount point can be done in the PARMLIB BPXPRMxx member or through OEIS or through OMVS. The OMVS command would be:
Code:
mount -t HFS -f 'OMVS.PROD.ADV' /u/prod/adv
where, again, the /u/prod/adv mount point depends upon the site -- it is a defined directory. If there are any files or directories in /u/prod/adv before the mount command is done, they will not be accessible as long as the mount is active; they become available again once the unmount is issued.
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Werner Spreeuwenberg

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Joined: 24 Jul 2009
Posts: 8
Location: Netherlands

PostPosted: Wed Oct 28, 2009 5:51 pm    Post subject:
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Robert,

Thanks - I'll send this to our mainframe controllers to verify it to our site standards.

Werner
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