Subject: Re: LFS panic
To: Blair Sadewitz <>
From: Tobias Nygren <>
List: current-users
Date: 12/03/2006 18:08:19
Blair Sadewitz wrote:
> I changed a 4.2BSD slice to 4.4LFS, and newfs_lfs'd it, accidentally
> without unmounting it.
> After the newfs, I unmounted it and remounted it.
> Then when I attempted to write to it, I got a panic due to an integer
> divide fault.  Sorry, no DDB, but I will enable it from now on.
> Any ideas?
> --Blair

When you unmounted the ffs filesystem the superblocks got updated,
causing some random corruption on the LFS filesystem.
I wouldn't expect any operating system to deal with such abuse
gracefully ;)