RAID 1...

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Jump To Analysis IOMeter - File Server Access Pattern Jump To Analysis

IOMeter Tests IO/sec MB/sec Response Time CPU Util. IO/CPU% Load = Linear SuperTrak-100 RAID 1 w/ 2 Drives 71.72 0.77 13.94 ms 0.68 % 105.47 Escalade 6400 RAID 1 w/ 2 Drives 74.43 0.80 13.43 ms 0.74 % 100.58 Load = Very Light SuperTrak-100 RAID 1 w/ 2 Drives 73.20 0.79 54.64 ms 0.79 % 92.66 Escalade 6400 RAID 1 w/ 2 Drives 116.88 1.27 34.22 ms 1.28 % 91.31 Load = Light SuperTrak-100 RAID 1 w/ 2 Drives 82.40 0.89 194.14 ms 0.92 % 89.57 Escalade 6400 RAID 1 w/ 2 Drives 126.98 1.37 125.82 ms 1.49 % 85.22 Load = Moderate SuperTrak-100 RAID 1 w/ 2 Drives 93.28 1.03 685.80 ms 0.98 % 95.18 Escalade 6400 RAID 1 w/ 2 Drives 135.37 1.47 472.43 ms 1.51 % 89.65 Load = Heavy SuperTrak-100 RAID 1 w/ 2 Drives 102.37 1.12 2496.30 ms 1.27 % 80.61 Escalade 6400 RAID 1 w/ 2 Drives 152.29 1.64 1679.50 ms 1.90 % 80.15

Jump To Analysis IOMeter - Workstation Access Pattern Jump To Analysis

IOMeter Tests IO/sec MB/sec Response Time CPU Util. IO/CPU% Load = Linear SuperTrak-100 RAID 1 w/ 2 Drives 84.87 0.66 11.78 ms 0.83 % 102.25 Escalade 6400 RAID 1 w/ 2 Drives 87.17 0.68 11.47 ms 0.85 % 102.55 Load = Very Light SuperTrak-100 RAID 1 w/ 2 Drives 85.90 0.67 46.56 ms 0.97 % 88.56 Escalade 6400 RAID 1 w/ 2 Drives 131.54 1.02 30.40 ms 1.45 % 90.72 Load = Light SuperTrak-100 RAID 1 w/ 2 Drives 96.40 0.75 165.95 ms 1.01 % 95.45 Escalade 6400 RAID 1 w/ 2 Drives 137.33 1.07 116.50 ms 1.48 % 92.79 Load = Moderate SuperTrak-100 RAID 1 w/ 2 Drives 108.49 0.85 589.64 ms 1.14 % 95.17 Escalade 6400 RAID 1 w/ 2 Drives 149.93 1.17 426.68 ms 1.51 % 99.29 Load = Heavy SuperTrak-100 RAID 1 w/ 2 Drives 119.50 0.93 2139.58 ms 1.64 % 72.87 Escalade 6400 RAID 1 w/ 2 Drives 169.88 1.32 1505.44 ms 2.42 % 70.20

Jump To Analysis IOMeter - Database Access Pattern Jump To Analysis

IOMeter Tests IO/sec MB/sec Response Time CPU Util. IO/CPU% Load = Linear SuperTrak-100 RAID 1 w/ 2 Drives 78.88 0.62 12.67 ms 0.75 % 105.17 Escalade 6400 RAID 1 w/ 2 Drives 81.77 0.64 12.22 ms 0.85 % 96.20 Load = Very Light SuperTrak-100 RAID 1 w/ 2 Drives 80.39 0.63 49.76 ms 0.87 % 92.40 Escalade 6400 RAID 1 w/ 2 Drives 109.63 0.86 36.48 ms 1.27 % 86.32 Load = Light SuperTrak-100 RAID 1 w/ 2 Drives 91.59 0.72 174.66 ms 0.99 % 92.52 Escalade 6400 RAID 1 w/ 2 Drives 113.54 0.89 140.89 ms 1.26 % 90.11 Load = Moderate SuperTrak-100 RAID 1 w/ 2 Drives 103.86 0.81 615.98 ms 1.11 % 93.57 Escalade 6400 RAID 1 w/ 2 Drives 122.89 0.96 520.55 ms 1.28 % 96.01 Load = Heavy SuperTrak-100 RAID 1 w/ 2 Drives 112.91 0.88 2263.55 ms 1.54 % 73.32 Escalade 6400 RAID 1 w/ 2 Drives 139.90 1.09 1828.14 ms 1.90 % 73.63

Jump To Analysis IOMeter - Random Write Pattern Jump To Analysis

IOMeter Tests IO/sec MB/sec Response Time CPU Util. IO/CPU% Load = Linear SuperTrak-100 RAID 1 w/ 2 Drives 109.51 0.86 9.13 ms 1.03 % 106.32 Escalade 6400 RAID 1 w/ 2 Drives 106.62 0.83 9.37 ms 1.07 % 99.64 Load = Very Light SuperTrak-100 RAID 1 w/ 2 Drives 109.21 0.85 36.62 ms 1.04 % 105.01 Escalade 6400 RAID 1 w/ 2 Drives 106.59 0.83 37.52 ms 1.23 % 86.66 Load = Light SuperTrak-100 RAID 1 w/ 2 Drives 109.32 0.85 146.35 ms 1.12 % 97.61 Escalade 6400 RAID 1 w/ 2 Drives 106.78 0.83 149.81 ms 1.26 % 84.75 Load = Moderate SuperTrak-100 RAID 1 w/ 2 Drives 111.20 0.87 575.22 ms 1.18 % 94.24 Escalade 6400 RAID 1 w/ 2 Drives 107.48 0.84 595.34 ms 1.30 % 82.68 Load = Heavy SuperTrak-100 RAID 1 w/ 2 Drives 119.03 0.93 2147.58 ms 1.65 % 72.14 Escalade 6400 RAID 1 w/ 2 Drives 113.70 0.89 2249.21 ms 1.67 % 68.08

Jump To Analysis IOMeter - Sequential Write Pattern Jump To Analysis

IOMeter Tests IO/sec MB/sec Response Time CPU Util. IO/CPU% Load = Linear SuperTrak-100 RAID 1 w/ 2 Drives 41.28 10.32 24.21 ms 1.91 % 21.61 Escalade 6400 RAID 1 w/ 2 Drives 110.85 27.71 9.02 ms 3.83 % 28.94 Load = Very Light SuperTrak-100 RAID 1 w/ 2 Drives 41.39 10.35 96.62 ms 1.91 % 21.67 Escalade 6400 RAID 1 w/ 2 Drives 110.78 27.70 36.10 ms 4.30 % 25.76 Load = Light SuperTrak-100 RAID 1 w/ 2 Drives 41.39 10.35 386.60 ms 2.04 % 20.29 Escalade 6400 RAID 1 w/ 2 Drives 110.83 27.71 144.34 ms 4.26 % 26.02 Load = Moderate SuperTrak-100 RAID 1 w/ 2 Drives 41.37 10.34 1546.60 ms 2.61 % 15.85 Escalade 6400 RAID 1 w/ 2 Drives 110.85 27.71 577.32 ms 5.66 % 19.58 Load = Heavy SuperTrak-100 RAID 1 w/ 2 Drives 41.17 10.39 5591.48 ms 2.40 % 17.15 Escalade 6400 RAID 1 w/ 2 Drives 109.59 27.40 2245.22 ms 5.83 % 18.80

Although many assume that redundancy is RAID 1's only benefit, the scores presented above illustrate that, depending on the quality of the controller, significant increases in performance may be gained through RAID 1 array relative to a single drive. The reason, as mentioned earlier, is load balancing. Keep in mind that RAID 1 arrays consist of two drives that store the exact same data. As a result, all drives may be utilized simultaneously to service different read requests. Write requests are another matter, however, since each write request must be carried out by all drives to ensure that content remains the same across all disks.

Although the SuperTrak's RAID 1 scores aren't earth shattering, Workstation, File Server, and Database scores post significant improvements over their respective base scores. Random Write performance remains about the same as that of a single drive while Sequential Write performance is somewhat lower.

On the other hand, the Escalade's RAID 1 scores are very impressive. Although they start slightly lower than a single drive under a Linear load, Workstation, File Server, and Database scores skyrocket under Light loads and remain much higher than base scores up through the Heavy load tests. TwinStor in action... we'd be lying if we said that we weren't impressed.

Random Write performance, on the other hand, is much worse than that of a single drive. We're somewhat baffled by the large disparity. While it's expected that RAID 1 random write performance will be equal to or somewhat worse than a single drive, the gap displayed by the Escalade is surprising. Sequential write performance, on the other hand, is virtually exactly the same as a single drive.

 SuperTrak vs Escalade RAID 01/10 Performance...