I dont have this problem... yet! but i remember reading that with sata, xp doesnt format properly and you lose gigs? well i dont want that and i remember the fix was download and make a diskette of diskkeeper or something like that? can anyone remember what its called? i cant search the forum using search button for something i dont know what it is called. also what is partitioning? is it putting the OS in a space by itself to make it go .. faster? stop it getting interupted? ive no idea. should you always partition then format? ive only ever just formatted over unpartitioned space