On Mar 25, 2013, at 12:04 PM, Piergiorgio Sartor <piergiorgio.sartor@xxxxxxxx> wrote: > Hi all, > > I've a two disk RAID-10 (far 2, I guess). > One HDD seems to be going to the HDD heaven, > so I'm planning to change it. > > The most convenient HDD I found has 4K sectors, > while the actual ones have 512 byte sectors. It is a 4Kn drive, or a 512e drive? If it's 512e, as long as you add the whole disk or ensure alignment, it's OK. For 4Kn drives, that may be a problem. But so far I've only seen 4Kn drives as large 3+TB external USB. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html