[ ... ] > The "on different drives" part let me wonder _how_ are chunks > distributed. [ ... ] Question 1: as the two schema have > different reliability characteristics, which is really used? It does not matter (except to people writing MD-specific tools). There is nothing special as to the ordering of drives or chunks on drives. Also reliability is a *statistical* property not a geometric one... > [ ... ] However, this is susceptible to any consecutive > two-disk failures. A schema like [... ] would not suffer from > this problem (eg: disk 2 & 3 can fail and the array is still > working). That "consecutive two-disk failures" is really funny! If two-paired-disk failure in RAID10 bother you, try RAID14: http://www.sabi.co.uk/blog/13-two.html#131213 Warning: that does not come at no cost :-). -- 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