Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcdc!hpldola!ritchie From: ritchie@hpldola.HP.COM (Dave Ritchie) Newsgroups: comp.sys.ibm.pc Subject: Re: 1.2meg/360k compatibility question Message-ID: <11250084@hpldola.HP.COM> Date: 11 Jul 89 22:18:05 GMT References: Organization: HP Elec. Design Div. -ColoSpgs Lines: 26 >In article <2250@astroatc.UUCP> brown@astroatc.UUCP (Vidiot) writes: > >>First off the problem of writing 360K diskettes on a 1.2M drive is a real >>problem. The only way is to have both a 1.2M and a 360K drive. > >Not true. I've worked on a Compaq Portable III with a dual speed >1.2 that could format a 360K that can be read on a standard PC. >The problem I have is identifying who makes the drive. I know >that Teac, Toshiba, and Fujitsu make dual speed 1.2 megs. I >trying to find out which one works best. > >(Please send E-mail. I'll summarize and post to the net.) > >nghiem@walt.cc.utexas.edu >!cs.utexas.edu!ut-emx!walt!nghiem >---------- This is true iff you bulk-erase the diskettes and reformat in 360K format on the 1.2M drive. If you write to these disks with a 360K drive, the wider track of the 360K drive can cause problems later when writing with a 1.2M drive. This works on all of the 1.2M drives I used *which are well aligned*. (3 1/2" disks use the same track width with a different clock speed for each density - thus no incompatibility problems). Dave