[mythtv-users] Disk Full - Recovery from?

[Tortise]

Hi

My mythbuntu 8.10 (uptodate or within a day or two) has stopped running with disk full messages and NTP failure on rebooting.

df tells me 
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1             11535344   3870420   7078956  36% /
tmpfs                  1556120         0   1556120   0% /lib/init/rw
varrun                 1556120       368   1555752   1% /var/run
varlock                1556120         0   1556120   0% /var/lock
udev                   1556120      2840   1553280   1% /dev
tmpfs                  1556120         0   1556120   0% /dev/shm
lrm                    1556120      2004   1554116   1% /lib/modules/2.6.27-11-g                              eneric/volatile
/dev/sda6            475537480 475537440        40 100% /var/lib

/var/lib is full!

I note /var/lib/mythtv/recordings has I assume start images and the mpg's in it.

OK Can I identify a recording to delete to get it going again? 
Can I identify something I don't want and delete in a way that respects the mySQL structure?
Will deleting something corrupt the sql links?
At this stage I plan to delete a 7G recording and overwrite its name with an empty file, to reclaim 7G and presumably get going again.

The problem seems to have arisen from things not being deleted from mythweb.

In advance many thanks for any advice offered.
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