Path: utzoo!utgpu!water!watmath!clyde!rutgers!ukma!psuvm.bitnet!ws5 From: WS5@PSUVM.BITNET Newsgroups: comp.sys.ibm.pc Subject: Re: Hub ring on HD floppies Message-ID: <27808WS5@PSUVM> Date: 16 Dec 87 17:12:49 GMT References: <415@wa3wbu.UUCP> <450@wb3ffv.UUCP> Why high capacity disks don't have hub rings (I think): Since the HD disks contain 80 tracks, the tracks are very thin. Head Organization: The Pennsylvania State University - Computation Center Lines: 7 alignment is much more critical than for standard floppies, and it seems that the reinforcing ring tends to cause head tracking problems with these disks, so the manufacturers don't use the ring on the disks. I read that explanation somewhere a while back, and unfortunately don't remember where. Anyway, it seems plausible to me.