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Dual IBM 75GXP Drive IDE RAID Performance Tests:
By Barney B.
Published: 6/26/2000


System/Hardware Used:

Base System: G4/400MHz Yikes (PCI), 40GB Maxtor DiamondMax Plus 40Gb 7200RPM ATA66 hard drive, 20Gb Seagate Barracuda 7200RPM ATA66, 384Mb RAM, VM Off

RAID: 2 x IBM Deskstar 75GXP 45GB DTLA 307045 striped as a single volume using SoftRAID 2.2.1. ACard ATA/66 PCI IDE Controller with latest Firmware and ATA66 Ribbon cables

Installation Process:

I had a bit of trouble installing the drives. Trying to be a wise guy and as the RAID was only for testing purposes, I used a second U shaped cradle, now standard in G3 Rev 2 and G4's, but it would not fit in the far left hand side drive bay. With a bit of modification to the cradle, I'm certain it could most likely be fitted. Instead, I simple placed the cradle sideways inside the G4 case, making certain I could close the case without obstruction.

The drives run slightly warm. Noise is not particularly noticeable.


Benchmarks:

ATTO Tools Benchmark Test Results with Softraid Drivers:
IBM Dual 75GXP Results

[For comparison - here's a single 30GB IBM 75GXP Drive in a G4/400 AGP system onboard IDE-Mike]

*Single* IBM 75GXP 30GB Drive Results:
Single IBM 75GXP 30GB Drive Performance


Intech's QuickBench Results:
Intech Quickbench Results


MacBench Disk/Pub Disk Results:
Mac Bench Disk and Pub Disk results

[Note: these graphs will be replaced soon with Barney's tests comparing a single IBM drive to the dual drive RAID in the same system. Until then I wanted to show some sort of single drive comparison.-Mike]

MacBench Disk Inspection Tests:
Macbench Disk Inspection Tests


FWB Benchtest results w/FWB RAID Drivers:
FWB Benchtest results


Real World Tests:

Duplicating a 500Mb VPC image file

40Gb Maxtor DiamondMax Plus 40 - 0:40
86Gb IBM RAID - 0:28


Photoshop 5.5 110Mb File 99 Layers:

For these tests, as well as opening the file from the Maxtor, the file was also copied to the RAID drive. Firstly the Maxtor was used as the scratch disk, then the RAID was set as the scratch disc. Results are from opening the same file from each drive with alternating scratch disks to see if there was any appreciable difference


Opening File

File on Maxtor - Maxtor Scratch/RAID Scratch
File on RAID - Maxtor Scratch / RAID Scratch

40Gb Maxtor DiamondMax Plus 40 - 1:07 / 0:58
86Gb IBM RAID - 0:58 / 0:56


Flattening:

File on Maxtor - Maxtor Scratch/RAID Scratch
File on RAID - Maxtor Scratch / RAID Scratch

40Gb Maxtor DiamondMax Plus 40 - 0:24 / 0:18
86Gb IBM RAID - 0:24 / 0:18


Rotating 90°Counterclockwise:

File on Maxtor - Maxtor Scratch/RAID Scratch
File on RAID - Maxtor Scratch / RAID Scratch

40Gb Maxtor DiamondMax Plus 40 - 0:02 / 0:02
86Gb IBM RAID - 0:02 / 0:015


Gaussian Blur 50:

File on Maxtor - Maxtor Scratch/RAID Scratch
File on RAID - Maxtor Scratch / RAID Scratch

40Gb Maxtor DiamondMax Plus 40 - 0:10 / 0:09
86Gb IBM RAID - 0:09 / 0:09


Summary Comments:

Although file duplication, copying and file opening was noticeably faster, once again - based on all test done by Mike, myself and other readers - any gain using an IDE RAID setup once expense is factored in, is highly questionable.
-Barney


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