Path: utzoo!attcan!uunet!cs.utexas.edu!hellgate.utah.edu!hellgate!jacobs From: jacobs@cs.utah.edu (Steven R. Jacobs) Newsgroups: comp.sys.ibm.pc Subject: Re: SPARC -> MS-DOS Message-ID: Date: 11 Jun 90 14:31:29 GMT References: <3041@crash.cts.com> <4987@plains.UUCP> <3785@dogie.macc.wisc.edu> <10119@chaph.usc.edu> <11364@sdcc6.ucsd.edu> Organization: University of Utah CS Dept Lines: 20 In-reply-to: cg108fep@icogsci1.ucsd.edu's message of 10 Jun 90 21:05:14 GMT In article <11364@sdcc6.ucsd.edu> cg108fep@icogsci1.ucsd.edu (Dennis Lou) writes: > In article jacobs@cs.utah.edu (Steven R. Jacobs) writes: >>> 2. You can't format DOS disks (there is no mformat), >>You can with "mkdfs", which is part of the package. There are options >>for 720K and 1.44M formats. > > > Does it have the same "can't read 720k disk on 720k drive if disk > has been formatted on 1.44M drive" problem (because the high density > head is narrower than the low density head)? I believe the heads on the 1.44M drives are the same width as the heads on the 720K drives. The increase in density is achieved by putting twice as many sectors on each track, but the number of tracks is 80 in both cases. The high-density vs. low-density problem only exists for the 5" floppies (1.2M vs. 360K) -- Steve Jacobs ({bellcore,hplabs,uunet}!utah-cs!jacobs, jacobs@cs.utah.edu)