Hmm I see... The reason why I ask is I have a 3ware 9650e raid controller and I was wondering if 4k sector drives would be a problem in the future. A LSI tech said that it was not supported (said nothing about the potential of a future firmware upgrade of course), and being that I couldn't remember if my drives on the card were formatted with 512B sectors I went into the format utility and it defaulted to 4k sectors prior to actually formatting, so confusion abounds for me.