Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pacbell!att!cbnewsd!bryan
From: bryan@cbnewsd.ATT.COM (bryan.k.delaney)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 720K disUsing 720K disks a 1.2M
Keywords: Don't Do it!!
Message-ID: <1293@cbnewsd.ATT.COM>
Date: 22 Aug 89 12:52:52 GMT
Organization: AT&T Bell Laboratories
Lines: 14

Hello,

You should not use 360/720K at 1.2M because there is a big
difference in the Oxide formula used in them. 360/720K disks use
the same oxide formula and I have never had a problem using
360K disks at 720K. But, 1.2M disks require a different write current
than the 360/720K disks so you should not use them at 360/720K
either.  

				Bryan DeLaney
				AT&T Bell Laboratories
				Naperville IL
				att!ihlpl!bryan