Not so much as not opened. But, it won't mess with invalid datasets.
An unopened dataset could be incompletely defined (usually an unknown
DSORG). 
   And, usually DFHSM won't migrate or delete without a backup existing.

Dave Gibney
Information Technology Services
Washington State University


> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Pommier, Rex R.
> Sent: Friday, August 14, 2009 10:41 AM
> To: [email protected]
> Subject: Re: DFSMS and deleting expired datasets by management class
> 
> Jack,
> 
> Secondary Space Mgmt runs at 23:00 every night.  I see no errors in
the
> HSM sysouts.
> 
> Is it possible that HSM won't touch a dataset that hasn't been opened?
> For my test, I merely allocated some datasets then left them sit.  I
> just opened one today and changed it to see if that would make any
> difference.
> 
> Rex
> 
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of John Kelly
> Sent: Friday, August 14, 2009 10:14 AM
> To: [email protected]
> Subject: Re: DFSMS and deleting expired datasets by management class
> 
> <snip>
> I'm trying to get DFSMShsm to delete expired datasets based on
> management
> class
> <unsnip>
> 
> Does SECONDARY SPACE MANAGEMENT run? That's where they should get
> deleted
> if in fact they have not been 'accessed' in 5 days. Also look in the
> HSM
> 
> SYSOUTs for the SECONDARY SPACE MANAGEMENT (or process the FSRs) and
> see
> 
> if give you and error for the DSNs that should be scratched.
> I don't think that HSM will backup a DSN that hasn't been opened, or
at
> least given the basics by a Data Class.
> 
> Jack Kelly
> 202-502-2390 (Office)
> 
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