On 08/01/18 22:01, Dave Chinner wrote: > Yup, 21 devices in a RAID 10. That's a really nasty config for > RAID10 which requires an even number of disks to mirror correctly. > Why does MD even allow this sort of whacky, sub-optimal > configuration? Just to point out - if this is raid-10 (and not raid-1+0 which is a completely different beast) this is actually a normal linux config. I'm planning to set up a raid-10 across 3 devices. What happens is that is that raid-10 writes X copies across Y devices. If X = Y then it's a normal mirror config, if X > Y it makes good use of space (and if X < Y it doesn't make sense :-) SDA: 1, 2, 4, 5 SDB: 1, 3, 4, 6 SDC: 2, 3, 5, 6 Cheers, Wol -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
