I have a system that uses drives on all channels, eg master/slave. and I have encountered any slowdown, by using primary and secondary disks in the same channel. Yes it is slower, but for me performance is good enough. It serves upwards of 100gigs of data over the network per day. I use mdadm on all my raid systems, as it was easier to setup and has automatic email notification. I wrote a document on using mdadm. http://rootraiddoc.alioth.debian.org I'm trying to put hot spares in my systems because I'm getting perhaps 1 disk failed every 2 weeks to a month. It does seem a waste of space, but hard drives are cheap. -- Luke Computer Science System Administrator Security Administrator,College of Engineering Montana State University-Bozeman,Montana - 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