Filesystem marker.

[Brooks Davis]

On Wed, Jan 14, 2004 at 02:20:55PM -0500, Robert Watson wrote:
> 
> On Wed, 14 Jan 2004, David Gilbert wrote:
> 
> > Is there a set of bytes at some offset in a block that is common to any
> > instance of a BSD ufs filesystem?  I ask because recently my home
> > machine erased it's fdisk block _and_ the bsdlabel with it.  It
> > certainly didn't have time to erase the whole disk, but I'm having
> > trouble guessing where the partitions are. 
> > 
> > /usr/ports/sysutils/gpart will look for partitions on a disk ... but it
> > only knows to look for bsd disklabels ... not bsd filesystems.  Ideally,
> > I'd like to make a bsd filesystem module for gpart with some pointers
> > from the group. 
> 
> I ported the OpenBSD version of their scan_ffs to FreeBSD. However, it
> only speaks UFS1:
> 
>   http://www.watson.org/~robert/freebsd/scan_ffs_freebsd4/
> 
> It might also require tweaking to even build on -CURRENT, as I haven't
> lost any file systems recently enough to have needed to test.  One of the
> nice things about this tool is that it can generate output that can then
> be fed into disklabel to write the disklabel you need back to disk.

A port of scan_ffs that support UFS1 and UFS2 was committed yesterday as
sysutils/scan_ffs:

http://www.freshports.org/sysutils/scan_ffs

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
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