Accelerate Your Mac! logo Initio Miles
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 3.0
Anubis Raid
PR 18.24
SR 16.85
PW 7.30
SW 5.21
PR 44.65
SR 40.95
PW 23.18
SW 12.51
PR 59.74
SR 40.97
PW 23.79
SW 16.42
PR 59.12
SR 17.14
PW 23.14
SW 18.69
Adaptec 2940
Bios 2.5
Anubis Raid
PR 20.12
SR 18.86
PW 8.04
SW 6.96
PR 48.22
SR 44.67
PW 26.25
SW 24.63
PR 59.81
SR 52.86
PW 33.26
SW 17.11
PR 56.29
SR 17.02
PW 26.37
SW 18.56
Adaptec 2940
Bios 3.0
ATTO Raid
PR 18.87
SR 17.80
PW 8.32
SW 7.13
PR 46.53
SR 42.58
PW 27.56
SW 24.16
PR 59.92
SR 43.79
PW 35.62
SW 16.51
PR 61.26
SR 17.39
PW 26.06
SW 18.96
Adaptec 2940
Bios 2.5
ATTO Raid
PR 19.32
SR 17.75
PW 8.01
SW 6.79
PR 46.24
SR 42.14
PW 26.14
SW 22.96
PR 60.33
SR 44.67
PW 35.49
SW 17.16
PR 60.54
SR 17.45
PW 26.68
SW 19.18
Adaptec 2940
Bios 3.0
SoftRaid2
PR 20.85
SR 19.73
PW 37.36
SW 28.49
PR 49.18
SR 46.97
PW 36.06
SW 27.60
PR 60.65
SR 51.13
PW 35.11
SW 19.39
PR 59.15
SR 17.13
PW 30.50
SW 19.08
Adaptec 2940
Bios 3.0
Remus Lite
PR 18.87
SR 16.49
PW 8.52
SW 7.14
PR 42.58
SR 39.37
PW 26.56
SW 24.28
PR 57.30
SR 46.74
PW 25.96
SW 17.62
PR 57.60
SR 17.31
PW 24.96
SW 19.16
Adaptec 2940
Bios 2.5
Remus Lite
PR 19.70
SR 16.83
PW 8.87
SW 6.99
PR 44.01
SR 40.20
PW 26.45
SW 23.89
PR 57.44
SR 46.19
PW 27.45
SW 17.17
PR 58.49
SR 17.33
PW 24.41
SW 18.94
Adaptec 2940
Bios 3.0
RTK 2.06
PR 22.15
SR 20.80
PW 10.77
SW 8.07
PR 47.56
SR 44.40
PW 25.39
SW 18.08
PR 58.92
SR 30.94
PW 34.32
SW 18.37
PR 60.93
SR 17.14
PW 24.96
SW 19.56
ATTO
Anubis Raid
PR 18.60
SR 17.33
PW 7.96
SW 4.87
PR 44.73
SR 40.92
PW 24.10
SW 12.37
PR 59.33
SR 39.42
PW 26.06
SW 16.88
PR 60.05
SR 17.32
PW 24.01
SW 18.57
ATTO
ATTO Raid
PR 19.02
SR 17.73
PW 8.46
SW 6.83
PR 48.31
SR 43.51
PW 28.93
SW 22.64
PR 59.38
SR 43.53
PW 28.51
SW 15.92
PR 60.62
SR 17.43
PW 23.60
SW 19.20
ATTO
SoftRaid2
PR 21.83
SR 20.33
PW 19.49
SW 17.99
PR 49.95
SR 47.20
PW 29.45
SW 25.46
PR 60.21
SR 50.03
PW 35.54
SW 19.46
PR 58.63
SR 17.19
PW 29.18
SW 18.99
ATTO
Remus Lite
PR 20.31
SR 17.37
PW 8.37
SW 7.24
PR 44.57
SR 41.08
PW 26.89
SW 24.14
PR 57.67
SR 46.58
PW 27.55
SW 17.35
PR 56.65
SR 17.27
PW 24.29
SW 18.98
ATTO
RTK 2.06
PR 23.97
SR 22.29
PW 8.63
SW 6.61
PR 48.97
SR 45.64
PW 26.42
SW 16.20
PR 60.44
SR 31.28
PW 29.72
SW 15.86
PR 60.12
SR 17.12
PW 29.93
SW 19.05
Initio Miles
Anubis Raid
PR 17.08
SR 16.11
PW 7.63
SW 6.75
PR 34.59
SR 31.21
PW 23.24
SW 12.51
PR 42.56
SR 31.35
PW 24.57
SW 16.80
PR 40.89
SR 16.82
PW 19.94
SW 18.97
Initio Miles
ATTO Raid
PR 17.46
SR 16.35
PW 9.12
SW 6.82
PR 35.02
SR 32.12
PW 26.98
SW 22.57
PR 41.35
SR 31.45
PW 27.44
SW 16.32
PR 42.29
SR 17.50
PW 24.20
SW 19.14
Initio Miles
SoftRaid2
PR 19.89
SR 18.76
PW 39.01
SW 35.05
PR 37.69
SR 35.70
PW 31.72
SW 28.19
PR 42.58
SR 37.18
PW 34.99
SW 18.47
PR 42.84
SR 17.21
PW 20.88
SW 18.86
Initio Miles
Remus Lite
PR 16.48
SR 14.57
PW 10.09
SW 7.20
PR 32.29
SR 29.93
PW 26.89
SW 23.23
PR 39.66
SR 31.68
PW 32.19
SW 17.77
PR 40.15
SR 17.23
PW 22.93
SW 19.17
Initio Miles
RTK 2.06
PR 19.16
SR 18.09
PW 8.13
SW 6.58
PR 35.84
SR 34.13
PW 26.68
SW 20.83
PR 42.70
SR 26.33
PW 30.86
SW 15.54
PR 42.94
SR 17.17
PW 22.84
SW 19.34
Jackhammer
ATTO Raid
PR 18.73
SR 17.25
PW 7.89
SW 6.81
PR 45.52
SR 41.59
PW 26.72
SW 24.39
PR 60.19
SR 42.78
PW 30.43
SW 16.39
PR 61.41
SR 17.28
PW 25.93
SW 18.96
Jackhammer
Anubis Raid
PR 18.04
SR 16.59
PW 7.75
SW 5.61
PR 46.34
SR 41.90
PW 23.95
SW 12.44
PR 61.70
SR 41.80
PW 32.97
SW 15.71
PR 60.73
SR 17.36
PW 24.24
SW 18.68
Jackhammer
SoftRaid2
PR 21.66
SR 20.39
PW 38.06
SW 33.97
PR 51.22
SR 47.82
PW 30.98
SW 26.69
PR 62.40
SR 52.66
PW 36.48
SW 19.22
PR 62.01
SR 17.26
PW 30.59
SW 19.06
Jackhammer
Remus Lite
PR 18.37
SR 16.17
PW 8.11
SW 7.02
PR 42.01
SR 38.46
PW 26.15
SW 24.40
PR 56.94
SR 44.20
PW 31.95
SW 17.98
PR 56.72
SR 17.26
PW 20.96
SW 19.15
Jackhammer
RTK 2.06
PR 23.72
SR 22.52
PW 8.13
SW 6.90
PR 48.08
SR 44.98
PW 26.89
SW 21.68
PR 64.36
SR 32.74
PW 26.72
SW 16.00
PR 64.11
SR 17.56
PW 21.94
SW 18.96
Stock SCSI
IBM AV
7200rpm Dr.
FWB
PR 3.73
SR 3.17
PW 4.74
SW 3.69
PR 6.14
SR 5.34
PW 6.65
SW 5.96
PR 6.96
SR 6.74
PW 7.23
SW 6.90
PR 7.29
SR 7.18
PW 7.42
SW 7.26

Note: 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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