On Tue, 2006-09-05 at 07:35 +1000, Neil Brown wrote: > Try > for i in `seq 1 20`; do > dd if=/dev/sda of=/tmp/try-$i conv=direct > done > for i in `seq 2 20`; do > cmp -l /tmp/try-1 /tmp/try=$i > done I tried a variant of this: for i in `seq 1 20`; do dd if=/dev/sda1 of=/tmp/try-$i count=4 bs=4096 iflag=direct sleep 0.25 done Tried it with and without the sleep, on all 4 drives. In all cases, the 20 "try" files were identical. -- Josh Litherland (josh@xxxxxxxxxxx) - 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