Ah, yeah that makes sense (I did know that the header was moved to the end of the NAND backup to make room for the MBR), what I meant though was after the 0x200 bytes of the NAND header and before the start of the fat32 header I had about 10 MB of extra space (I separated out the NAND backup, MBR, fat32 partition and free space out to separate files and measured them, there was 10 MB of (seemingly) random garbage (no strings or anything distinguishable) though it may have to do with the 4 MB alignment but with the odd size of 10 MB I don really see how that could be the case, (maybe it's because one of the blocks was only half used up or something) But I'd think there'd be SOME data written there, maybe just zero's to pad it or something, I mean sure as little reads/writes as possible helps extend the life of the card as much as possible... anyways doesn't really matter I was mostly curious