I should have read your post more closely, 'the VTOC inventories the free space'. OK, that makes sense.

I don't have any reason to mistrust current calculations of free space. Haven't used wall charts for a very long time. But, we used to maintain a CMS file of DASD space usage... including OUR view of free space. That was in the 3370/3380 days. And, yes that was a PITA to maintain.

On 02/27/2010 11:21 AM, Charles Mills wrote:
My guess is that it is "computed" at the time by Ditto.

Charles

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Rich Smrcina
Sent: Saturday, February 27, 2010 9:08 AM
To: [email protected]
Subject: Re: Item on TPF

I can see free space on a VSE volume with Ditto and native VSE tools.
Been like that for as long as I remember.

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Rich Smrcina
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