Urgent Help needed please

[news.andy@spiegl.de (Andy Spiegl)]

Hi!

trying to install new packages I just noticed that I can't write to
/var/lib/dpkg anymore.  The error I get is:
"No space left on device".

I took a look at /var/log/kern.log and found this:

... kernel: EXT2-fs error (device 08:07): ext2_new_block: Free blocks count \
     corrupted for block group 4 
... last message repeated 207 times
... last message repeated 133 times
and so on.

Help!  What can I do to resolve this without rebooting the machine?
Well, I guess I could reboot it, but it is very far away from me and if it
gets stuck during the reboot I'd have an even bigger problem.  Besides,
there are some users logged in and I'd hate to kick them out. :-(

Please send help soon!
Thanks so much in advance,
 Andy.

-- 
 Andy Spiegl, University of Technology, Muenchen, Germany
 E-Mail: Andy@spiegl.de     URL: http://www.spiegl.de
 Finger pgp.andy@spiegl.de for my PGP key
                                o      _     _         _
  --------- __o       __o      /\_   _ \\o  (_)\__/o  (_)
  ------- _`\<,_    _`\<,_    _>(_) (_)/<_    \_| \   _|/' \/
  ------ (_)/ (_)  (_)/ (_)  (_)        (_)   (_)    (_)'  _\o_
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~