Figure 6.2 shows the reduction in reposition events with speed matching enabled relative to speed matching disabled.  The statistics show that at each host data rate from 1-32 MB/sec, Speed matching enabled reduces the number of reposition events.  Data points from 33-40 were removed for clarity.  At speeds greater than 32 MB/sec, there is no difference between speed matching enabled vs disabled. At those speeds, the drive is operating at its fastest possible speed (same speed as speed matching disabled). Figure 6.2:  Speed Matching Comparison- Reposition Events 1946 948 615 448 349 282 234 198 171 149 131 116 103 92 82 77 126 120 113 106 98 92 84 77 71 63 55 48 41 34 27 19 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Host Data Rate MB/sec 0 50 100 150 200 250 Speed On Constant Speed Matching Comparison Reposition Events 74 70 66 63 60 55 52 50 44 40 37 35 34 26 23 19 11 31 25 19 13 7 23 19 14 9 7 19 15 10 6 7 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Host Data Rate MB/sec 0 50 100 150 200 250 Speed On Constant Speed Matching Comparison Reposition Events Page 17 of 20 p1   p2   p3   p4   p5   p6   p7   p8   p9   p10   p11   p12
p13   p14   p15   p16   p17   p18   p19   p20