This is a general question, but I'll give a specific. If I create an array with assume clean and proceed to write to the device, what happens with the parity? EX: mdadm -C /dev/md0 -n 4 -l 6 -e 1.0 -b internal -c 128 --assume-clean \ sdc2 sdd2 sdf2 sde2 Then: dd if=/dev/zero of=/dev/md0 bs=1M When it finishes, will all the parity blocks be correct for raid 5 and raid6? Would changing md/stripe_cache_size up/down make a difference to the parities? -- Microsoft has beaten Volkswagen's world record. Volkswagen only created 22 million bugs. -- 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