Linda, Without Guaranteed Space all except the first volume will only be candidate volumes until the writing records to the first volume causes it to extend to the second and subsequent volumes.
The case Ed described is that the dataset is empty, but it had extents across multiple volumes, which is not the usual behavior for an empty dataset that does not use guaranteed space. Hence my curiosity. I agree completely with your reply, but it does not solve the empty dataset riddle. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of > Linda Mooney > Sent: Thursday, May 05, 2011 8:22 PM > To: [email protected] > Subject: Re: [IBM-MAIN] Do we need to implement HSM > > Hi Ron, > > > > If a VSAM dataset is allocated with a candidate list of volumes > VOLSER=(VOL001,VOL002,VOL003 ), the datset will allocate to the first volser > in the list, then the next, etc. The catalog entry will show all of the > volumes, even if there is no VTOC entry there yet . Back a few years ago, > when we had much smaller volumes, we had some large VSAM datasets (non-SMS) > that we allocated this way. > > > > Regards, > > > > Linda > > ---------------------------------------------------------------------- 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
