Hi. On Saturday 08 August 2009 09:56:59 you wrote: > But each stripe only holds 128k of data. You have to align to that. I beg to differ. There are two data chunks and one parity chunk, thus a whole stripe is 192k long if you've a 64k chunk size. If you align to 128k and you put e.g. ext4 on it with the correct fs stride and stripe-width settings, you'll probably end up with worse performance since you start in the middle of a stripe even though properly aligned to a chunk boundary. Or am I totally on the wrong track here...?! > No, nothing special about sector 0. So sector 0 gets striped like all the others meaning that it counts to the first 192k stripe? So in order to get everything properly stripe aligned it was correct to leave a 196.096 byte span free after sector 0. Best regards, matthias. -- 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
