File System Checks at boot happen more often in 10.04

With 10.04, the file system check at boot time seems to be happening much more often then in the past -- how can I change how often this is happening? Note that I have seen question 8475 that seems similar, but I can't get any -l listings from "tune2fs" and without being able to successfully get a listing, I'm concerned about commanding a change...
Here are the results of a "sudo tune2fs -l":

tadiv@tadiv-desktop:~$ sudo tune2fs -l /dev/sda
tune2fs 1.41.11 (14-Mar-2010)
tune2fs: Bad magic number in super-block while trying to open /dev/sda
Couldn't find valid filesystem superblock.
tadiv@tadiv-desktop:~$

So, am I just doing something wrong?

Thanks for the help!
Tom