It appears that:
HSEND PATCH   .MCVT.+01E3 BITS(......1.)  VERIFY(.MCVT.+01E3 X'00')  
OUTDATASET(GIBNEY.MVCTPAT)
2nd byte of MCVTIAGE

Delayed an expiration even with USERDATASETSERIALIZATION

Dave Gibney
Information Technology Services
Washington State University


> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]]
> On Behalf Of Gibney, Dave
> Sent: Monday, July 22, 2013 6:54 PM
> To: [email protected]
> Subject: DFHSMDATASETSERIALIZATION | USERDATASETSERIALIZATION with
> DFHSM and z/OS 1.11
> 
>    I run with USERDATASETSERIALIZATION and since I have many potentially
> multi volume PS datasets (Stripped/Extended in default dataclass), I really
> need to continue this.
>    I also do EXPIREDDATASETS(SCRATCH). I also have disk datasets created
> with EXPDT=98nnn because I implemented TMM long ago. I have a process in
> place to detect and ALTER dsname NULLIFY RETENTION these and allow the
> MGMTCLAS (which is derived from EXPDT) to control expiration.
>    Recently, the applications people shifted some processing around and found
> the window to create and then DFHSM expires before I get the EXPDT reset.
> This caused the next job to fail :(
>   With USERDATASETSERIALIZATION, the DFHSM  Integrity Age for Space
> Management is set to zero days. It appears a longer Integrity Age would delay
> this scratching of the dataset.
> 
>    I am contemplating using a PATCH to set this age to 1 or 2 and see if this
> keeps the dataset around long enough to reset. Does anyone have any
> experience or thoughts on such a DFHSM patch?
> 
> 
> Dave Gibney
> Information Technology Services
> Washington State University
> 
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