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02-15-2008, 10:04 AM
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 How to read differnt formated floppies Hallo, i have floppydisks written by a tar, but they are formated with 17 sectors/track and with 77 tracks per surface, each sector has 512 bytes on a 5.25" media. How can i set parameters of the diskettes drivers to read (and perhaps write) it, this stupid format? Thanks a lot! Peter      |
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02-15-2008, 10:06 AM
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| Re: How to read differnt formated floppies In article <Xns93B67C5AE1845jajii1netscape@205.188.138.161> , James J <SPAMMYjajii1@netscape.net> wrote: >Peter Michel <proORGA-Leimen.without-this@web.de> expounded in >news:612ogv06j0dcdgi4i8edgqfhe2otgvqp1d@4ax.com : > >> Hallo, >> i have floppydisks written by a tar, but they are formated with 17 >> sectors/track and with 77 tracks per surface, each sector has 512 >> bytes on a 5.25" media. >> How can i set parameters of the diskettes drivers to read (and perhaps >> write) it, this stupid format? >> Thanks a lot! >> Peter >> > > I think you may be out of luck. "man fd" should show you the supported >floppy formats. I don't see 17 sectors/track in the list. > > You could try one of the "autosense" device names (eg. /dev/rinstall). >Maybe that'll work. Here's a quote from "man fd": > > > However, when accessing a floppy disk for other > > operations (read and write), the autosense nodes > > (/dev/[r]install, /dev/[r]install1, > > /dev/[r]dsk/finstall, and /dev/[r]dsk/finstall1) > > can be used. In this case, the floppy disk driver > > will automatically determine (autosense) the format > > previously established on the disk and then perform > > the requested operation. > Good luck. I wonder if he might have luck with the /dev/dsk/f05ht. It's 18 sectors per track and most closely emulates the 8" DD format - which is what the 5" seems to look like. I'd suggest trying the dd and if it fails after sector 17, and he saved that, then maybe skip _might_ work to take him to the next track - as the f05ht is an 18 sector format if I'm reading things correctly. Then he could just cat the pieces together, and then dd them out ot a regularly formatted disk. Bill -- Bill Vermillion - bv @ wjv . com |
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02-15-2008, 10:06 AM
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| Re: How to read differnt formated floppies >>> i have floppydisks written by a tar, but they are formated with 17 >>> sectors/track and with 77 tracks per surface, each sector has 512 >>> bytes on a 5.25" media. >>> How can i set parameters of the diskettes drivers to read (and perhaps >>> write) it, this stupid format? Hi, the diskettes where written by an Xenix derivat on normal 5.25" Floppy media. The HW had a programmable device under /dev, which also was possible to use with the old ecma formats. Yes, they wrote it with 2*77*17*512 Bytes on a 5.25" HD disc 8-[:] But, the old HW isn't longer available :-(( and on the medias is source code we needed. Will try and see what will go. Thanks!!! Peter |
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