The raid10 module in linux supports a layout described as 'far=2'. In this layout, with two drives, the first half of the drives is used for a raid0, and the second half is used for a mirrored raid0 with the data on the other disk. In this layout reads should certainly go at raid0 speeds, though there is cost in the speed of writes.
Remember, RAID-10 far=2 mode was very slow in July 2005; don't know if it has improved since then. See: http://www.mail-archive.com/linux-raid@xxxxxxxxxxxxxxx/msg02339.html PS. If you ever need it I have plenty of data from a super redundant 5 disk RAID-1 recorded with atsar. It does quite well balancing many small, parallel random reads from a webserver. Struggles a little when mixing a single large read with many small parallel reads. - 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
