On Tue, 26 Sep 2017 09:17:21 -0400, John Eells wrote:

>ibmmain wrote:
>> Brian
>>
>> Could you send us a sample how to run ICKDSF with the INIT parameter.... 
>> then its verified empty   :)
><snip>
>
I suspect there was some mischief in Brian's suggestion.

>If you only want to verify that it *is* empty without deleting anything
>that's left on the volume, something along the lines of DFSMSdss DUMP
>DATASET INCLUDE(**) with PARM='TYPRUN=NORUN' will tell you whether any
>data sets remain on the volume without actually dumping any data.
>
>IEHLIST LISTVTOC FORMAT will also show whether there are any data sets
>on the volume.
>
Which of these avoid even a minuscule TOCTTOU hazard?

>If you want to logically delete anything that's left, ICKDSF INIT will
>do that, but it will not overwrite or erase the actual data (for which
>there are other operations like INSPECT with CHECK and TRKFMT with
>ERASEDATA).

-- gil

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