Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!husc6!panda!genrad!decvax!decwrl!labrea!Shasta!mrh From: mrh@Shasta.STANFORD.EDU (Marc Hannah) Newsgroups: comp.sys.mac Subject: Re: 512K Mac/800K Drive Message-ID: <1059@Shasta.STANFORD.EDU> Date: Thu, 18-Dec-86 14:02:04 EST Article-I.D.: Shasta.1059 Posted: Thu Dec 18 14:02:04 1986 Date-Received: Fri, 19-Dec-86 01:38:03 EST References: <127200001@inmet> <1034@Shasta.STANFORD.EDU> <480@gumby.WISC.EDU> Organization: Stanford University Lines: 45 Summary: 800K MFS disks In article <480@gumby.WISC.EDU>, bezanson@gumby.WISC.EDU (Brian Bezanson) writes: > In article <567@mit-amt.MEDIA.MIT.EDU>, bc@mit-amt.MEDIA.MIT.EDU (bill coderre) writes: > > In article <1034@Shasta.STANFORD.EDU>, mrh@Shasta.STANFORD.EDU (Marc Hannah) writes: > > > ... If you are worried about compatibility however, > > > you can format an 800K disk as an MFS disk and you will have the extra > > > space in addition to compatibility. > > > There is no way that I know of to make an 800K MFS disk. I wanted this > > to happen pretty badly for a certain application, but NOOOOO. > > > If there is a way, please post it. I'm willing to be proven wrong!....bc > > Well I hope this will help. The MacServe manager has several formatting > options for hard disks, floppies, and it's partitions. It allows you >... > Another way (I haven't actually tried this), is to format a standard 800K HFS > floppy. Then reboot with an old system/finder (<3.0/5.0). Now reformat > you 800K disk under the old MFS system. > -- > Brian Bezanson {seismo,ihnp4,allegra,topaz,harvard}!uwvax!gumby!bezanson > Manta Software Corp. bezanson@gumby.wisc.edu I guess I don't understand what the hassle is. I have done the following and it will DEFINATELY work on a Mac which has the new ROMS and the 800K disk drive. Use System 2.0, Finder 4.1 to initialize a NEW (or previously used) disk in the 800K drive. The resulting disk will be an MFS 800K disk. What I don't know and you will have to try is whether this trick will work on a Mac with the old roms. The problem is this...in order to use the 800K drive you need the new Sony driver which is contained in the new ROMS and is in the HD20 file which people with the 64K roms use to run HFS and use the 800K diskdrive. The HD20 file loads the new driver AND HFS if it is on a disk with system >3.0. I don't know what happens if you try to use it with system 2.0. You should just try it. So try this to get an 800K MFS disk if you have the old ROMS: Put system 2.0, Finder 4.1, and the HD20 file (Hard Disk 20 file which you use to startup your system with the 800K external drive) onto a 400K MFS floppy disk. Start up the system with that disk. Initialize a disk in your 800K drive. Is it 800K or 400K or is it usable at all? David Gelphman BITNET address: DAVEG@SLACVM Bin #88 SLAC ARPANET address: DAVEG@SLACVM.BITNET Stanford, Calif. 94305 UUCP address: ...psuvax1!daveg%slacvm.bitnet 415-854-3300 x2538 usual disclaimer #432 applies: my employer apologies for the fact that I have access to this net.