On Saturday 16 October 2004 02:45 pm, Eben King wrote:
> On Sat, 16 Oct 2004, R.G. Mayhue wrote:
> > On Saturday 16 October 2004 01:34 pm, Chad Perrin wrote:
> > > Levi Bard wrote:
> > > > On Sat, 16 Oct 2004 11:12:14 -0400 (EDT), Eben King
> > > >
> > > > <eben1@tampabay.rr.com> wrote:
> > > >>OK, how does one identify the filesystem on a device? "file" says:
> > > >>
> > > >>[root@pc root]# file - < /dev/sda
> > > >>standard input: x86 boot sector
> > > >>
> > > >>(/dev/sda is one of these, 0.5 GB: http://kasercorp.com/usbjumbo.cfm
> > > >> )
> > > >>
> > > >>I successfully mounted it as ext2, but just because I happened to
> > > >> *know* that was what it was. In general, what should I do? How
> > > >> about an offset that'll skip ahead straight to the filesystem?
> > > >>
> > > >> offset in 1K blocks --vvv
> > > >>dd if=/dev/sda bs=1024 skip=xxx | file -
> > > >
> > > > I never found a good solution to this other than trial && error.
> > >
> > > I don't recall, but . . . is it possible to mount a drive or partition
> > > without knowing the filesystem type, even if it's not in fstab? If so,
> > > you should be able to mount it and use the mount command to find out.
> > > I'm pretty sure I've mounted something that wasn't in fstab without
> > > knowing the filesystem type, though I could be misremembering.
> >
> > Mount will probe the superblock for the filesystem type if no -t option
> > is given.
>
> Only among those filesystems it knows about, and sometimes it guesses
> wrong (umsdos vs FAT).
Which is why I said to look at the warning under the -t option.
-- rob
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