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Lab Notes: PCI Ultra-Wide SCSI Controllers Part 2 - Dual Card/Dual Drive Raid Tests. Intro | Cards Tested | ATTO Benchmark | FWB Benchtest | Time Drive | MacBench | Summary ATTO Benchmark Results with Dual Card/Dual Drive Raid 0 Array
The ATTO Tools utility has a benchmarking function, which I personally like as it's fast and does not use the system disk cache (although it has an option to do so). Bypassing the system disk cache gives a better indication of the card and drive performance, eliminating the effect of a large cache setting in the memory control panel - which inflates scores in other benchmarks like MacBench 4.0.
When the tests are run with the system cache enabled, peak reads and writes often reach 60-100+MB/sec (esp. with the PowerForce and other G3 cards with large fast backside caches). You can argue that this is the state you will using the system, but for an accurate test of card and drive/driver performance, we want to remove as many other factors as possible.
For this test pairs of each brand of card was installed in slots 1A and 2D. In the future I plan to show results of tests in other slots of the Tsunami motherboard in the PowerTower Pro. The FWB driver was optimized using the standard SCSI Configure utility control/optimize function. The Conley driver was set to the default 256 I/Os setting, with fast read, fast write (defaults) and fast Photoshop settings enabled. Other packages were left at their default settings (I ensured that the hard disk caches were enabled). The 32K scores below would be indicative of performance in a database application, while the larger sizes would be more applicable to typical file I/O and larger file applications like video capture. Most drivers, especially Raid, tend to be optimized for the larger file size I/O, but this is usually selectable in the array setup phase. Generally larger block sizes are better for video capture and smaller block sizes are better for prepress, database, and other general tasks.
Raid Software used: ATTO Raid v1.1, CharisMac Anubis Raid 1.36, Conley SoftRaid 2.0, FWB Raid ToolKit 2.06, Adaptec Remus Lite v1.4.
ATTO Benchmark v1.1 Results - Dual Card/Dual Drive Raid Array
PR = Peak Read, SR = Sustained Read, PW = Peak Write, SW = Sustained Write.
All rates are in MegaBytes/Second.
Red = Best Score, Blue = Worst Score.Card Driver 32KB Test 128KB Test 512KB Test 2MB Test Adaptec 2940
Bios 3.0Anubis Raid PR 18.24
SR 16.85
PW 7.30
SW 5.21PR 44.65
SR 40.95
PW 23.18
SW 12.51PR 59.74
SR 40.97
PW 23.79
SW 16.42PR 59.12
SR 17.14
PW 23.14
SW 18.69Adaptec 2940
Bios 2.5Anubis Raid PR 20.12
SR 18.86
PW 8.04
SW 6.96PR 48.22
SR 44.67
PW 26.25
SW 24.63PR 59.81
SR 52.86
PW 33.26
SW 17.11PR 56.29
SR 17.02
PW 26.37
SW 18.56Adaptec 2940
Bios 3.0ATTO Raid PR 18.87
SR 17.80
PW 8.32
SW 7.13PR 46.53
SR 42.58
PW 27.56
SW 24.16PR 59.92
SR 43.79
PW 35.62
SW 16.51PR 61.26
SR 17.39
PW 26.06
SW 18.96Adaptec 2940
Bios 2.5ATTO Raid PR 19.32
SR 17.75
PW 8.01
SW 6.79PR 46.24
SR 42.14
PW 26.14
SW 22.96PR 60.33
SR 44.67
PW 35.49
SW 17.16PR 60.54
SR 17.45
PW 26.68
SW 19.18Adaptec 2940
Bios 3.0SoftRaid2 PR 20.85
SR 19.73
PW 37.36
SW 28.49PR 49.18
SR 46.97
PW 36.06
SW 27.60PR 60.65
SR 51.13
PW 35.11
SW 19.39PR 59.15
SR 17.13
PW 30.50
SW 19.08Adaptec 2940
Bios 3.0Remus Lite PR 18.87
SR 16.49
PW 8.52
SW 7.14PR 42.58
SR 39.37
PW 26.56
SW 24.28PR 57.30
SR 46.74
PW 25.96
SW 17.62PR 57.60
SR 17.31
PW 24.96
SW 19.16Adaptec 2940
Bios 2.5Remus Lite PR 19.70
SR 16.83
PW 8.87
SW 6.99PR 44.01
SR 40.20
PW 26.45
SW 23.89PR 57.44
SR 46.19
PW 27.45
SW 17.17PR 58.49
SR 17.33
PW 24.41
SW 18.94Adaptec 2940
Bios 3.0RTK 2.06 PR 22.15
SR 20.80
PW 10.77
SW 8.07PR 47.56
SR 44.40
PW 25.39
SW 18.08PR 58.92
SR 30.94
PW 34.32
SW 18.37PR 60.93
SR 17.14
PW 24.96
SW 19.56ATTO Anubis Raid PR 18.60
SR 17.33
PW 7.96
SW 4.87PR 44.73
SR 40.92
PW 24.10
SW 12.37PR 59.33
SR 39.42
PW 26.06
SW 16.88PR 60.05
SR 17.32
PW 24.01
SW 18.57ATTO ATTO Raid PR 19.02
SR 17.73
PW 8.46
SW 6.83PR 48.31
SR 43.51
PW 28.93
SW 22.64PR 59.38
SR 43.53
PW 28.51
SW 15.92PR 60.62
SR 17.43
PW 23.60
SW 19.20ATTO SoftRaid2 PR 21.83
SR 20.33
PW 19.49
SW 17.99PR 49.95
SR 47.20
PW 29.45
SW 25.46PR 60.21
SR 50.03
PW 35.54
SW 19.46PR 58.63
SR 17.19
PW 29.18
SW 18.99ATTO Remus Lite PR 20.31
SR 17.37
PW 8.37
SW 7.24PR 44.57
SR 41.08
PW 26.89
SW 24.14PR 57.67
SR 46.58
PW 27.55
SW 17.35PR 56.65
SR 17.27
PW 24.29
SW 18.98ATTO RTK 2.06 PR 23.97
SR 22.29
PW 8.63
SW 6.61PR 48.97
SR 45.64
PW 26.42
SW 16.20PR 60.44
SR 31.28
PW 29.72
SW 15.86PR 60.12
SR 17.12
PW 29.93
SW 19.05Initio Miles Anubis Raid PR 17.08
SR 16.11
PW 7.63
SW 6.75PR 34.59
SR 31.21
PW 23.24
SW 12.51PR 42.56
SR 31.35
PW 24.57
SW 16.80PR 40.89
SR 16.82
PW 19.94
SW 18.97Initio Miles ATTO Raid PR 17.46
SR 16.35
PW 9.12
SW 6.82PR 35.02
SR 32.12
PW 26.98
SW 22.57PR 41.35
SR 31.45
PW 27.44
SW 16.32PR 42.29
SR 17.50
PW 24.20
SW 19.14Initio Miles SoftRaid2 PR 19.89
SR 18.76
PW 39.01
SW 35.05PR 37.69
SR 35.70
PW 31.72
SW 28.19PR 42.58
SR 37.18
PW 34.99
SW 18.47PR 42.84
SR 17.21
PW 20.88
SW 18.86Initio Miles Remus Lite PR 16.48
SR 14.57
PW 10.09
SW 7.20PR 32.29
SR 29.93
PW 26.89
SW 23.23PR 39.66
SR 31.68
PW 32.19
SW 17.77PR 40.15
SR 17.23
PW 22.93
SW 19.17Initio Miles RTK 2.06 PR 19.16
SR 18.09
PW 8.13
SW 6.58PR 35.84
SR 34.13
PW 26.68
SW 20.83PR 42.70
SR 26.33
PW 30.86
SW 15.54PR 42.94
SR 17.17
PW 22.84
SW 19.34Jackhammer ATTO Raid PR 18.73
SR 17.25
PW 7.89
SW 6.81PR 45.52
SR 41.59
PW 26.72
SW 24.39PR 60.19
SR 42.78
PW 30.43
SW 16.39PR 61.41
SR 17.28
PW 25.93
SW 18.96Jackhammer Anubis Raid PR 18.04
SR 16.59
PW 7.75
SW 5.61PR 46.34
SR 41.90
PW 23.95
SW 12.44PR 61.70
SR 41.80
PW 32.97
SW 15.71PR 60.73
SR 17.36
PW 24.24
SW 18.68Jackhammer SoftRaid2 PR 21.66
SR 20.39
PW 38.06
SW 33.97PR 51.22
SR 47.82
PW 30.98
SW 26.69PR 62.40
SR 52.66
PW 36.48
SW 19.22PR 62.01
SR 17.26
PW 30.59
SW 19.06Jackhammer Remus Lite PR 18.37
SR 16.17
PW 8.11
SW 7.02PR 42.01
SR 38.46
PW 26.15
SW 24.40PR 56.94
SR 44.20
PW 31.95
SW 17.98PR 56.72
SR 17.26
PW 20.96
SW 19.15Jackhammer RTK 2.06 PR 23.72
SR 22.52
PW 8.13
SW 6.90PR 48.08
SR 44.98
PW 26.89
SW 21.68PR 64.36
SR 32.74
PW 26.72
SW 16.00PR 64.11
SR 17.56
PW 21.94
SW 18.96Stock SCSI
IBM AV
7200rpm Dr.FWB PR 3.73
SR 3.17
PW 4.74
SW 3.69PR 6.14
SR 5.34
PW 6.65
SW 5.96PR 6.96
SR 6.74
PW 7.23
SW 6.90PR 7.29
SR 7.18
PW 7.42
SW 7.26Note: This test did not use the system disk cache, to better indicate the actual drive and scsi interface performance.
I think the two drive array is the limiter with the dual card setup. A larger number of drives or even faster drives (i.e. Seagate's Cheetah 10,000 rpm drive) would have shown more of an advantage for the dual card configuration.
TOP PERFORMERS: JackHammer Card and Conley SoftRaid 2.
View Single Card/Drive Scores for this Test
Some call the ATTO test a little too simple, so I also tested the cards using FWB's Hard Disk ToolKit BenchTest, and the scores are shown on the next page.
Index of Dual Card/Dual Drive SCSI Raid Comparison
Intro | Cards Tested | ATTO Benchmark | FWB Benchtest | Time Drive | MacBench = Results Summary = | Single Card/Drive Scores for this Test
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