So if the dataset is allocated in cylinders - you can only release to the used cylinder If the dataset is allocated in tracks - then to the lowest tracks.
The F (FREE) command in ISPF will do this. Caveats. DSORG will also control what can be released. If there is a PSU, DA, or others (I do not remember which ones) the Free may not work. If the dataset is a PDS it may have GAS, so you need to compress it before you can free the unused space. Lizette -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Charles Mills Sent: Friday, June 07, 2013 4:31 PM To: [email protected] Subject: Re: Multiple volume dataset question No, I'm not trying to release space that isn't there! LOL These datasets definitely occupy space. A typical dataset is 150 tracks of which 5 are in use. The volume list shows as CCXZ08 * * so presumably all of the 150 tracks are on CCZZ08 and that is where I want to release space (not on * and *!). Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Lizette Koehler Sent: Friday, June 07, 2013 4:23 PM To: [email protected] Subject: Re: Multiple volume dataset question If the volume shows a star (*) then it is a place holder only. Takes up no room or space. Just lets you know that if you need to go beyond one volume you can. Check out candidate volume in the SMS manuals. There is no SPACE to release when there is a * for the volser So rather than specifying a volser to start with, SMS just puts in a place holder. Only space you can release is allocated space Think of the IDCAMS statement DEF NVSAM(NAME(xxx.yy) VOL (* * * * *)) This define could go on 5 volumes. But does not have to. Until the allocation uses a * no space is actually allocated ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
