Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!bu.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!spool.mu.edu!munnari.oz.au!metro!dramba!janm
From: janm@dramba.neis.oz (Jan Mikkelsen)
Newsgroups: comp.unix.sysv386
Subject: Re: root and boot floppy on ISC
Keywords: root boot floppy ISC interactive
Message-ID: <1991Apr15.044746.29950@dramba.neis.oz>
Date: 15 Apr 91 04:47:46 GMT
References: <538@jahangir.UUCP> <1991Apr11.171616.14088@sci34hub.sci.com> <1991Apr12.175337.3858@crom2.uucp>
Organization: Dramba Holdings, Lindfield, Australia
Lines: 20

In article <1991Apr12.175337.3858@crom2.uucp> jim@crom2.uucp (James P. H. Fuller) writes:
[  text deleted ...]
>
>     But you *can't* hack a copy of the boot floppy itself (even though it's
>cloneable by either dd or DOS diskcopy) because it isn't mountable, because
>mount doesn't recognize it as containing any kind of valid filesystem.  It
>isn't 1K, it isn't 2K, it isn't DOS, it isn't XENIX, and that's all the types
>of filesystem that come with ISC.  fstyp(1M) can't make head or tail of the
>boot floppy.  Has anyone got any idea what it is?
>
>                                              James P. H. Fuller
>                                              jim%crom2@nstar.rn.com

The actual filesystem starts at track one, not track zero.  Track zero
contains the bootstrap, which is read by the ROM BIOS.  Try mounting
/dev/dsk/f0q15d instead of /dev/dsk/f0q15dt ...
-- 
Jan Mikkelsen
janm@dramba.neis.oz.AU or janm%dramba.neis.oz@metro.ucc.su.oz.au
"She really is."