This distribution contains files required to benchmark raw scsi performance on your system. The kernel patches are required to test reads of more than 4096 bytes at a time, and are only for the purposes of this benchmark, and should never be added to the distribution kernel. These patches merely add a new ioctl to be used for benchmarking and should not affect the normal usage of the kernel. You will also need to have a ramdisk configured into your kernel to use this, although it does not need to be very big - 64Kb should be sufficient. I am enclosing the output that I get when I run this with my Toshiba drive with an Adapotec 1542B controller. I cleaned it up a bit so that it would fit in an 80 column display. Size 1717911 sectorsize 512 Blocksize Telapsed Nblocks Throughput --------- -------- ------- ---------- 4096 7.6 10000 673684 5120 6.88 10000 744186 6144 6.15 10008 833186 7168 5.37 10010 954398 8192 5.33 10000 960600 9216 5.07 10008 1010669 10240 4.77 10000 1073375 11264 4.54 10010 1128881 12288 4.38 10008 1169884 13312 4.27 10010 1200262 14336 4.28 10024 1199132 15360 4.18 10020 1227330 16384 3.98 10016 1288490 17408 4.23 10030 1214033 18432 3.71 10008 1381157 19456 3.82 10032 1344603 20480 3.74 10000 1368983 21504 3.54 10038 1451823 22528 3.48 10032 1475972 23552 3.5 10028 1466953 24576 3.57 10032 1438763 25600 3.48 10000 1471264 26624 3.42 10036 1502465 27648 3.39 10044 1516969 28672 3.34 10024 1536613 29696 3.38 10034 1519943 30720 3.3 10020 1554618 31744 3.19 10044 1612077 32768 3.24 10048 1587832 36864 3.19 10008 1606299 40960 3.27 10000 1565749 45056 3.02 10032 1700789 49152 2.94 10080 1755428 53248 2.86 10088 1805963 57344 2.86 10080 1804531 61440 2.89 10080 1785799 65536 2.94 10112 1761001