Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!columbia!cs!cs.columbia.edu!abrams From: abrams@cs.columbia.edu (Steven Abrams) Newsgroups: comp.os.minix Subject: Re: Read/write of 1.44 mb disks Message-ID: Date: 28 Dec 89 23:22:02 GMT References: <418@fsu.scri.fsu.edu> Sender: abrams@cs.columbia.edu Organization: Columbia University Lines: 48 In-reply-to: nall@nu.cs.fsu.edu's message of 28 Dec 89 16:10:45 GMT In article <418@fsu.scri.fsu.edu> nall@nu.cs.fsu.edu (John Nall) writes: OK, I give up. In Minix 1.5.0, floppy.c has a comment line which says that it supports 1.44 mb floppy disks. But I have a problem reading them after I write them, and suspect that the driver is not really writing (or perhaps not reading, or both) an 18-sector track. I am just doing a mkfs /dev/at1 1400 and then doing a mount /dev/at1 /user Anything that I'm doing wrong (yes, I have RTFM'd everywhere that seems obvious). Thanks for any help. First, I am still alive out here although I've been quite silent on the minix front. I'll be back in full strength in a few weeks, but I though I could help John out here. John, while I was beta-testing 1.4.5 on my PS/2 Model 80, I was able to use the 3.5" diskette with the full 1440 blocks no problem. This also worked on my AT the few times I ran 1.4.5 on it. I'm assuming that the 1.5.0 distribution hasn't changed anything in this area since none of the beta-testers complained about anything. One interesting note is that while there was a hacked up floppy.c somewhere on the net that had that same comment, it never figured out that the disk was 1.4 megs and wound up giving you a max of 1.2 meg on it, although it did work. Alas, any disketts written using this floppy.c were unreadable under the new and improved floppy.c... The only obvious thing I can think of is that the size thing is still an issue, and your /dev/at1 has a size of 1200 blocks. That would stop this from working. Hope I helped. Happy New Year to all. ~~~Steve -- /************************************************* * *Steven Abrams abrams@cs.columbia.edu * **************************************************/ #include #include