Historically, there was a problem, and that was a required restriction in those days. Modern CP does handle it correctly.
You lose a trivial amount of disk space by skipping cyl 0 consistently (180K or so per volume). Even so, IMHO, it is still good practice to avoid cyl 0 for all packs as a matter of consistency. One less thing to document or to forget about and have something happen later (like DIRMAINT allocating a minidisk in an area where you *really* don't want it...sigh). ________________________________ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, August 27, 2008 10:35 PM To: [email protected] Subject: SPOOL/PAGE and cylinder zero I have always thought that CP handles properly SPOOL and PAGE areas starting on cylinder zero. It would be a shot on its own foot if CP would destroy the VOLID and the allocation map. However, someone is stating that SPOOL and PAGE MUST NOT be allocated on cylinder zero, I wonder if someone can positively answer this question and point to any documentation that may exist about this. Francisco A. S. Grossi
