Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!princeton!njsmu!mccc!pjh From: pjh@mccc.edu (Pete Holsberg) Newsgroups: comp.unix.sysv386 Subject: Re: Does ESIX still not support RLL? Message-ID: <1991Apr25.200115.12310@mccc.edu> Date: 25 Apr 91 20:01:15 GMT References: <3080@cirrusl.UUCP> <513@pyrite.nj.pyramid.com> <3087@cirrusl.UUCP> Organization: The College On The Other Side Of Route One Lines: 18 In article <3087@cirrusl.UUCP> Rahul Dhesi writes: =The following is directed not towards Bill, but towards many Usenet =users who assume that RLL is some sort of disk interface standard. =It's not! It's just a way of putting bit patterns on the disk =surface. And it wasn't invented by Adaptec either. RLL means "run =length limited" -- a way of recording bits such that you never have =more than m consecutive raw ones or n consecutive raw zeroes. Tape In fact, what we call RLL here is actually only one of many possible RLL schemes. I believe that the "proper" name is "RLL 2,7." And if I haven't lost too many brain cells, I think I recall that MFM is RLL 1,3. Pete -- Prof. Peter J. Holsberg Mercer County Community College Voice: 609-586-4800 Engineering Technology, Computers and Math UUCP:...!princeton!mccc!pjh 1200 Old Trenton Road, Trenton, NJ 08690 Internet: pjh@mccc.edu Trenton Computer Festival -- 4/20-21/91