Bruce, Yes, and you jogged my memory a little too.
I believe the Home Address and R0 were described to me as "simulated," so if the track is otherwise empty, no backend storage would be used. Now, I also remember something in DFP/DFSMS, or RACF, or maybe a combination of both, where one could give a data set some kind of security attribute so that when it was deleted, all of its tracks would be "erased." If so, and the "erase" that's performed actually removes Record #1 and beyond, voilà, =all= of the backend storage occupied by the track's data would be freed. Anyone familiar with such an "erase" feature? --Art At 12:16 PM 7/8/2005, Bruce Black wrote: >Art, you got me thinking. As you pointed out, the bad side of your idea is >that it does use some backend storage for each track of zeros. My reference >for the STK SVA (successor to the RVA) says that it uses backend in 2k >increments, not 16K, but 16K might be right for the RVA. >Anyways, earlier in this thread someone suggested doing an ICKDSF INIT on the >volume and I responded that was a bad idea because it would use backend >storage. But I think I was wrong > >I believe that if a track in the RVA contains only a home address and a >standard R0 (with a CCHH matching the real CCHH and a data length of zero), no >data records on the track at all, then this track is NOT stored in the >backend; it is just a table entry indicating it is an empty track. >A ICKDSF Medial INIT (INIT with NOCHECK and VALIDATE specified) will do >exactly this to every track on the volume, which will release the backend >storage previously associated with any tracks on the volume. >Of course, this can be done only to an offline volume from which all data has >been moved elsewhere. ================================================== Art Celestini Celestini Development Services Phone: 201-670-1674 Wyckoff, NJ ============= http://celestini.com ============= Mail sent to the "From" address used in this post will be rejected by our server. Please send off- list email to: ibmmain<at-sign>celestini<dot>com. ================================================== ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
