Hi, We just quick tested the raid stability under the vanilla 2.6.36 kernel and got an unstable result. first, we create a raid5 array using 16 sata disks: mdadm -C /dev/md10 -l 5 -n 16 /dev/sd[b-q] then use dd to stress the io: dd if=/dev/zero of=/dev/md10 bs=1M After a while, usually several minutes, the system hangs. It looks like some kind of kernel deadlock. ping to this machine could get timely response, however, any other process just hangs. It is easily reproducible and everytime the test result is a system hang. Johnson -- 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