[ubuntu-uk] fsck during boot

[Mark Fraser]

I realised the other day that I hadn't seen my computer run fsck during boot 
for quite a while. Running dumpe2fs I get this:
Mount count:              220
Maximum mount count:      -1
Last checked:             Wed Mar 20 21:20:51 2013

I understand that I can run
tune2fs -c 35
To get it to check every 35 mounts, but do I have to do this when the 
partition is unmounted?

Not even sure why it has been set up this was as I don't remember changing it.