Hi all, It has been way too many years since the last time I dabbled with ICKDSF and VTOC definitions (probably over twenty, but I would rather not do the math). Back on those days, if memory serves me right, the only way to extend a VTOC was to clean the DASD of all its contents, put it offline, and recreate the VTOC with the new size. As a few years have passed, I have been going through the ICKDSF manual trying to find out if a VTOC can be extended without having to clear the volume first. I can not say that I have became enlightened. It seems to be possible but I am not quite sure about it. And this being a production volume I really would hate if things do not work as expected. So, in a nut shell, can I extend a VTOC from 90 to 900 tracks without having first to clean the DASD of all its files? Thank you in advance for any help, Best regards Jack
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