Need help restoring from filesystem failure

[Maxim Vetrov]

Hi to all,

I'm running 6.1 release compiled from source. For a half of june it run 
smoothly. But then somehow I got a filesystem crash - it just refused to 
start after reaching fstab mounts, saying that fs (/data) was not 
properly dismounted:
...
WARNING: /data was not properly dismounted
/data: bad dir ino 2 at offset 16384: mangled entry
panic: ufs_dir_bad: bad dir
...

I rebooted in single user mode and run fsck -f on each filesystem. All 
but one were clean.  I agreed on automatic correction suggested by fsck 
(shame on me, I do not remember what the message was about). Fsck 
applied suggested change and marked fs as clean. Then I tried to mount 
the fs:
 > mount /dev/ad0s1f /data
Instead I got complains about not properly dismounting and page fault 
while at kernel mode (page not present).
I run fsck one more time (it didn't find any problem this time) and 
rebooted the system. The first problem showed up. Now I have vicious 
circle: mangled entry and page fault.

Is there any way to correct the problem? I was not so "excited" if it 
had been /var or even /usr, but it was /data with all of my personal 
projects and I do not have backups!!!

Regards,
muxas