Volume mount attribute

IBM OS/370, MVS, OS/390, Linux, TPF, VM/CMS, VM/ESA, VSE/ESA, z/VM, z/VSE, z/OS, z/OS.e etc...

Volume mount attribute

Postby Srini Srini » Sat Jul 10, 2010 3:29 pm


Can some one tell me what is the difference between the DASD volume mount attributes Storage, Private and Public?

Thank you.
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Re: Volume mount attribute


Re: Volume mount attribute

Postby steve-myers » Sat Jul 10, 2010 11:35 pm

This goes back before SMS, which kind of killed the traditional mount attributes.

Private - Only data sets specified with a volume could be allocated on the volume.

Storage - Only non-temporary data sets could be allocated on the volume

Public - Only temporary data sets could be allocated on the volume.

The rules were similar for tape volumes, but with a kicker. "Public" tapes were not unloaded at end of step or end of job on the theory the volume was available for other uses; the (hopefully) temporary data set could be replaced by another data temporary or non-temporary data set.
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