btrfs advice needed

I've got a corrupted btrfs partition. Does the archlinux install disk have btrfsck on it? If yes, I'll probably need to run btrfs --repair /dev/sda2 on the system. If repair goes badly, I'll have to reinstall the system. I would like to know how to prevent btrfs corruption in the first place. -- Jude <jdashiel at panix dot com> "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." Ed Howdershelt 1940.