Dawid Szymanski wrote:

>Hello!
>
>I am looking for infromation about how lfs,mfs,ufs,ufs2 filesystems are working.
>What is the difference between ext[23] and BSD file systems.
>
>I need it to pass exams on "Operating Systems".
>
>I will be grateful for any help/links/hints.
>
You can have a look at the sources, if you're a coder..
Otherwise, here are some interesting links:

http://www.ussg.iu.edu/edcert/session2/disk/filesystem.html
http://lists.freebsd.org/pipermail/freebsd-current/2003-April/001444.html
http://www.tldp.org/HOWTO/Filesystems-HOWTO.html

I Hope they're helpfull to you.