MOD, I believe, does start by filling the last track; but it would be sheer luck if the erstwhile last block were a standard block. Consequently, the odds are stacked against the dataset remaining properly standard.
In any event, DISP=MOD with RECFM=FBS leaves the dataset labelled as RECFM=FB to obviate behavior unexpected by subsequent users. Sent from my iPhone > On Jan 6, 2017, at 08:13, Tom Marchant > <0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote: > > Are you sure? I'm not sure, but I thought that MOD would start by > filling up the last track. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
