> part test7 42249863 44249863 align 7
> term% for (i in /dev/sdC0/test?) { time rc -c 'dd -if /dev/zero -of '$i' -bs
> 4k -count 250000 >[2]/dev/null' }
> 0.57u 8.43s 20.40r rc -c dd -if /dev/zero -of /dev/sdC0/test0 -bs 4k
> -count 250000 >[2]/dev/null
> 0.50u 8.65s 20.71r rc -c dd -if /dev/zero -of /dev/sdC0/test1 -bs 4k
> -count 250000 >[2]/dev/null
> 0.64u 8.44s 20.73r rc -c dd -if /dev/zero -of /dev/sdC0/test2 -bs 4k
> -count 250000 >[2]/dev/null
> 0.60u 8.86s 20.54r rc -c dd -if /dev/zero -of /dev/sdC0/test3 -bs 4k
> -count 250000 >[2]/dev/null
> 0.64u 8.70s 20.77r rc -c dd -if /dev/zero -of /dev/sdC0/test4 -bs 4k
> -count 250000 >[2]/dev/null
> 0.55u 9.00s 20.62r rc -c dd -if /dev/zero -of /dev/sdC0/test5 -bs 4k
> -count 250000 >[2]/dev/null
> 0.48u 8.51s 20.61r rc -c dd -if /dev/zero -of /dev/sdC0/test6 -bs 4k
> -count 250000 >[2]/dev/null
> 0.59u 8.16s 20.78r rc -c dd -if /dev/zero -of /dev/sdC0/test7 -bs 4k
> -count 250000 >[2]/dev/null
>
250000*4096/20.78 = 49 mb/s. this is less than 1/2 the available
bandwidth giving the drive lots of wiggle room. and since you're
doing sequential i/o the drive can do write combining.
- erik
