Date: Tue, 11 Jul 2006 16:04:01 +0100 From: Ceri Davies <ceri@submonkey.net> To: John Baldwin <jhb@freebsd.org> Cc: Craig Rodrigues <rodrigc@crodrigues.org>, Scott Long <scottl@samsco.org>, freebsd-current@freebsd.org, Robert Watson <rwatson@freebsd.org>, freebsd-arch@freebsd.org Subject: Re: [RFC] mount can figure out fstype automatically Message-ID: <20060711150401.GI65857@submonkey.net> In-Reply-To: <200607110954.01691.jhb@freebsd.org> References: <20060708152801.GA3671@crodrigues.org> <20060711124356.Y78628@fledge.watson.org> <20060711132752.GF65857@submonkey.net> <200607110954.01691.jhb@freebsd.org>
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On Tue, Jul 11, 2006 at 09:54:00AM -0400, John Baldwin wrote:
> On Tuesday 11 July 2006 09:27, Ceri Davies wrote:
> >=20
> > Assuming that there is a valid partition type. I don't really know what
> > this makes, but there's a valid FAT filesystem on it:
> >=20
> > % truncate -s 1440k floppy
> > % sudo mdconfig -a -f floppy=20
> > md1
> > % sudo newfs_msdos -f 1440 /dev/md1
> > /dev/md1: 2847 sectors in 2847 FAT12 clusters (512 bytes/cluster)
> > bps=3D512 spc=3D1 res=3D1 nft=3D2 rde=3D224 sec=3D2880 mid=3D0xf0 spf=
=3D9 spt=3D18 hds=3D2 hid=3D0
> > % sudo mount -t msdos /dev/md1 /mnt
> > % df -h /mnt
> > Filesystem Size Used Avail Capacity Mounted on
> > /dev/md1 1.4M 1.0K 1.4M 0% /mnt
> > {ceri@shrike}-{~} % fdisk /dev/md1
> > ******* Working on device /dev/md1 *******
> > parameters extracted from in-core disklabel are:
> > cylinders=3D0 heads=3D255 sectors/track=3D63 (16065 blks/cyl)
> >=20
> > parameters to be used for BIOS calculations are:
> > cylinders=3D0 heads=3D255 sectors/track=3D63 (16065 blks/cyl)
> >=20
> > Media sector size is 512
> > Warning: BIOS sector numbering starts with sector 1
> > Information from DOS bootblock is:
> > The data for partition 1 is:
> > <UNUSED>
> > The data for partition 2 is:
> > <UNUSED>
> > The data for partition 3 is:
> > <UNUSED>
> > The data for partition 4 is:
> > <UNUSED>
> >=20
> > Ceri
>=20
> Dos floppies don't have an MBR (so fdisk on them is meaningless).
That agrees with observation :) Thanks!
Ceri
--=20
That must be wonderful! I don't understand it at all.
-- Moliere
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