Trying to recover data from FreeBSD 4.11 system

[Wojciech Puchar]

>
> So, I installed this drive as the second hard drive in a FreeBSD 6.2 system
> and I tried to mount it, but I got "incorrect super block".
>
> Looks like I have /dev/ad1, /dev/ad1s1, /dev/ad1s1c, and /dev/ad1s1e.

no ad1s1a?

>
> Is there a way to mount these filesystems?

possibly try fsck - i don't know (my first FreeBSD was 5.*) but maybe UFS 
changed a bit?