( for bs in 16M 4M 1M 256K 64K 16K 4K 1K 128 32 ; do echo -e "\nblocksize='$bs'" ; for i in 1 2 3 ; do time -f '%U user, %S system, %E elapsed, %I IO-in\n' dd if=/dev/sdf bs=$bs of=/dev/null ; done ; done ; for bs in 16M 4M 1M 256K 64K 16K 4K 1K 128 32 ; do echo -e "\nblocksize='$bs'" ; for i in 1 2 3 ; do time -f '%U user, %S system, %E elapsed, %I IO-in\n' dd if=/dev/sdf bs=$bs | dd bs=$bs | dd bs=$bs | cmp -l mandriva-linux-free-rc2-2010-x86_64.iso - ; done ; done ) >flash_readspeed_test02 2>&1 &

blocksize='16M'
0.00 user, 2.09 system, 26:42.30 elapsed, 15646720 IO-in
0.00 user, 1.23 system, 26:40.88 elapsed, 15646728 IO-in
0.01 user, 1.64 system, 27:11.51 elapsed, 15646728 IO-in

blocksize='4M'
0.00 user, 1.40 system, 26:11.83 elapsed, 15646728 IO-in
0.00 user, 1.78 system, 25:18.38 elapsed, 15646728 IO-in
0.00 user, 3.74 system, 19:59.44 elapsed, 15646776 IO-in

blocksize='1M'
0.01 user, 1.53 system, 27:06.33 elapsed, 15646728 IO-in
0.00 user, 1.51 system, 26:49.40 elapsed, 15646728 IO-in
0.01 user, 1.43 system, 27:10.03 elapsed, 15646728 IO-in

blocksize='256K'
0.01 user, 1.67 system, 26:58.64 elapsed, 15646728 IO-in
0.00 user, 1.44 system, 26:51.85 elapsed, 15646736 IO-in
0.01 user, 1.50 system, 26:47.80 elapsed, 15646768 IO-in

blocksize='64K'
0.04 user, 1.50 system, 27:37.85 elapsed, 15646728 IO-in
0.02 user, 1.26 system, 27:23.13 elapsed, 15646728 IO-in
0.01 user, 0.81 system, 27:05.57 elapsed, 15646728 IO-in

blocksize='16K'
0.00 user, 1.29 system, 27:29.59 elapsed, 15646728 IO-in
0.01 user, 1.21 system, 27:35.54 elapsed, 15646728 IO-in
0.03 user, 1.24 system, 27:30.15 elapsed, 15646728 IO-in

blocksize='4K'
0.06 user, 1.35 system, 27:23.84 elapsed, 15646728 IO-in
0.04 user, 1.42 system, 27:08.36 elapsed, 15646728 IO-in
0.02 user, 1.49 system, 26:45.76 elapsed, 15646728 IO-in

blocksize='1K'
0.11 user, 2.27 system, 26:34.69 elapsed, 15646728 IO-in
0.18 user, 2.46 system, 26:53.60 elapsed, 15646728 IO-in
0.08 user, 1.55 system, 27:26.48 elapsed, 15646728 IO-in

blocksize='128'
0.54 user, 3.43 system, 27:34.60 elapsed, 15646736 IO-in
0.75 user, 4.36 system, 27:12.58 elapsed, 15646736 IO-in
0.92 user, 4.48 system, 26:30.75 elapsed, 15646728 IO-in

blocksize='32'
26.76 user, 130.18 system, 24:09.89 elapsed, 15646728 IO-in
23.83 user, 108.08 system, 24:52.35 elapsed, 15646728 IO-in
20.98 user, 99.30 system, 24:14.45 elapsed, 15646728 IO-in

blocksize='16M'
0.00 user, 2.05 system, 13:28.49 elapsed, 8257792 IO-in
0.00 user, 2.26 system, 13:32.71 elapsed, 8257792 IO-in
0.01 user, 3.13 system, 11:51.61 elapsed, 8257792 IO-in

blocksize='4M'
0.00 user, 2.75 system, 12:13.60 elapsed, 8208640 IO-in
0.00 user, 3.00 system, 13:07.73 elapsed, 8208640 IO-in
0.01 user, 3.20 system, 12:30.62 elapsed, 8208640 IO-in

blocksize='1M'
0.00 user, 2.05 system, 12:16.48 elapsed, 8194304 IO-in
0.01 user, 2.54 system, 11:04.73 elapsed, 8194304 IO-in
0.01 user, 2.04 system, 12:00.75 elapsed, 8194304 IO-in

blocksize='256K'
0.01 user, 1.51 system, 12:51.53 elapsed, 8189696 IO-in
0.02 user, 1.65 system, 11:58.26 elapsed, 8189696 IO-in
0.01 user, 1.05 system, 13:25.03 elapsed, 8189696 IO-in

blocksize='64K'
0.04 user, 1.43 system, 13:04.11 elapsed, 8188712 IO-in
0.00 user, 1.09 system, 13:52.91 elapsed, 8188672 IO-in
0.01 user, 1.43 system, 13:46.92 elapsed, 8188672 IO-in

blocksize='16K'
0.03 user, 1.40 system, 13:12.24 elapsed, 8188608 IO-in
0.03 user, 1.54 system, 13:19.69 elapsed, 8188608 IO-in
0.09 user, 1.65 system, 12:37.72 elapsed, 8188608 IO-in

blocksize='4K'
0.11 user, 1.83 system, 11:41.94 elapsed, 8188640 IO-in
0.13 user, 1.82 system, 11:49.85 elapsed, 8188640 IO-in
0.08 user, 1.50 system, 12:46.68 elapsed, 8188384 IO-in

blocksize='1K'
0.32 user, 3.64 system, 11:02.94 elapsed, 8188384 IO-in
0.48 user, 4.40 system, 11:03.69 elapsed, 8188640 IO-in
0.43 user, 3.00 system, 11:09.07 elapsed, 8188384 IO-in

blocksize='128'
8.03 user, 37.19 system, 10:34.14 elapsed, 8188384 IO-in
8.40 user, 35.26 system, 10:54.39 elapsed, 8188640 IO-in
8.29 user, 38.78 system, 10:40.16 elapsed, 8188384 IO-in

blocksize='32'
22.23 user, 84.09 system, 11:43.24 elapsed, 8188424 IO-in
27.64 user, 101.11 system, 13:03.13 elapsed, 8188384 IO-in
31.57 user, 97.70 system, 13:41.01 elapsed, 8188640 IO-in