Unable to newfs/fsck partition on -current because of write failed.

I'm running -current from september, 14 on my notebook.

After an unclean shutdown (out of batteri) my /var filesystem died horrible. 
Now when i'm trying to do a fsck I always get "write failed" for a lot of 
blocks. I saw this error some months ago where I just wiped the fs with 
newfs. But now even newfs gives me "Write failed". This seems a bit odd 
because i can easily do a "dd if=/dev/zero of=/dev/ad0s2d" and clear out the 
label. Any hints ? I'm thinking geom and/or blocksize problems. But that's 
just a guess. 

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Cheers,
Nicolai Petri