+ /home/bart/software/scst/scripts/blockdev-perftest -d -s 30 -m 12 /dev/sdb blocksize W W W W(avg, W(std, W R R R R(avg, R(std, R (bytes) (s) (s) (s) MB/s) MB/s) (IOPS) (s) (s) (s) MB/s) MB/s) (IOPS) 67108864 1.214 1.216 1.217 842.538 0.877 13.165 0.593 0.595 0.593 1724.961 2.038 26.953 33554432 1.195 1.200 1.198 855.122 1.575 26.723 0.600 0.601 0.600 1704.743 1.130 53.273 16777216 1.172 1.174 1.169 873.698 1.523 54.606 0.616 0.616 0.616 1662.438 0.677 103.902 8388608 1.119 1.123 1.130 910.736 3.669 113.842 0.645 0.644 0.646 1587.590 1.094 198.449 4194304 1.031 1.031 1.038 990.844 3.259 247.711 0.704 0.702 0.702 1457.833 1.680 364.458 2097152 1.060 1.067 1.060 964.115 2.920 482.058 0.790 0.786 0.787 1299.803 2.868 649.902 1048576 1.204 1.214 1.199 849.322 4.385 849.322 0.870 0.867 0.872 1177.406 2.461 1177.406 524288 1.473 1.479 1.478 693.517 1.202 1387.034 1.042 1.041 1.041 983.273 0.081 1966.546 262144 1.550 1.557 1.559 658.387 1.614 2633.546 1.085 1.083 1.081 945.489 1.349 3781.955 131072 1.690 1.706 1.702 602.543 2.399 4820.346 1.206 1.203 1.200 851.348 1.722 6810.784 65536 2.107 2.113 2.146 482.630 3.884 7722.079 1.482 1.476 1.478 692.606 1.048 11081.702 32768 2.775 2.777 2.768 369.229 0.478 11815.333 2.063 2.054 2.053 497.891 1.146 15932.507 16384 4.131 4.274 4.160 244.560 3.574 15651.842 3.171 3.149 3.152 324.324 0.985 20756.707 8192 6.799 6.808 6.867 150.043 0.664 19205.441 5.322 5.327 5.315 192.437 0.180 24631.921 4096 12.134 12.328 12.300 83.568 0.586 21393.338 9.726 9.710 9.723 105.354 0.074 26970.661 + /home/bart/software/scst/scripts/blockdev-perftest -a -s 30 -m 12 /dev/sdb blocksize W W W W(avg, W(std, W R R R R(avg, R(std, R (bytes) (s) (s) (s) MB/s) MB/s) (IOPS) (s) (s) (s) MB/s) MB/s) (IOPS) 67108864 1.925 1.970 1.960 524.668 5.209 8.198 2.212 2.214 2.216 462.561 0.334 7.228 33554432 1.960 1.962 1.967 521.691 0.724 16.303 2.209 2.210 2.211 463.366 0.228 14.480 16777216 1.955 1.917 1.920 530.420 4.750 33.151 2.211 2.207 2.207 463.756 0.394 28.985 8388608 1.914 1.984 1.917 528.492 8.670 66.061 2.207 2.208 2.207 463.931 0.077 57.991 4194304 1.870 1.941 1.938 534.598 9.251 133.650 2.122 2.123 2.123 482.415 0.104 120.604 2097152 1.612 1.666 1.659 622.331 9.292 311.165 1.980 1.978 1.978 517.458 0.218 258.729 1048576 1.315 1.323 1.325 775.252 2.690 775.252 1.806 1.807 1.804 567.163 0.339 567.163 524288 1.229 1.237 1.232 830.708 2.355 1661.416 1.787 1.776 1.777 575.234 1.518 1150.469 262144 1.251 1.231 1.235 826.385 5.811 3305.540 1.772 1.758 1.755 581.327 2.404 2325.309 131072 1.225 1.227 1.225 835.457 0.716 6683.660 1.775 1.769 1.779 577.154 1.375 4617.232 65536 1.232 1.248 1.236 826.700 4.543 13227.206 1.771 1.785 1.784 575.236 2.070 9203.769 32768 1.246 1.240 1.258 820.529 4.900 26256.928 1.799 1.796 1.796 569.843 0.398 18234.980 16384 1.238 1.244 1.241 825.128 1.490 52808.204 1.802 1.798 1.799 569.064 0.490 36420.112 8192 1.243 1.246 1.245 822.696 0.767 105305.027 1.858 1.856 1.865 550.632 1.226 70480.914 4096 1.292 1.294 1.286 793.301 2.014 203085.143 1.876 1.882 1.864 546.462 2.260 139894.344