[arch-general] unclean filesystem

Uh, this might be a quick question, since it's a little abstract. I'm dual booting and I've noticed that every time I boot into Arch after I've booted into one of my other systems, there is a forced file system check. It's not a huge deal, because I use Arch almost exclusively, but I have to say, I cringe at the thought of having to boot into one of the other systems now. How would you trouble shoot this? I have also never seen a system where after every ~20 reboots, a file system check is mandatory. This might just be my ignorance here, so a reference to some background about that part of the boot process might suffice. Thanks in advance. -- chris