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Raid 0 benchmark seems low - I need more speed!

Last response: in Storage
January 16, 2011 1:04:01 AM

I have a RAID 0 setup just for video editing.
After I am done editing I move off the RAID 0 and start the next project.

I was curious about my PC, so I ran some hard drive benchmarks.

It seems like I am not gaining much with my RAID 0?
Maybe I need more then 2 disks?

My main Windows 7 single drive results:
HD Tune: WDC WD6401AALS-00L3B2 Benchmark
Transfer Rate Minimum : 52.5 MB/sec
Transfer Rate Maximum : 115.5 MB/sec
Transfer Rate Average : 93.4 MB/sec
Access Time : 12.3 ms
Burst Rate : 126.6 MB/sec
CPU Usage : -1.0%

HD Tune: Promise 2+0 Stripe/RAID0 Benchmark
Transfer Rate Minimum : 70.5 MB/sec
Transfer Rate Maximum : 92.8 MB/sec
Transfer Rate Average : 90.5 MB/sec
Access Time : 11.8 ms
Burst Rate : 75.6 MB/sec
CPU Usage : -1.0%
a b G Storage
January 18, 2011 12:06:30 AM

What promise controller do you used?
Related resources
a b G Storage
January 20, 2011 11:04:03 PM

theedudenator said:

This is a link to the data sheet

The speed you get it's about right!

If you read the Advanced HBA Features section, it states 266MB/sec with 66MHz clock. None of the PCI slot in desktop that runs 66MHz, but 33Mhz

So the MAX bandwidth PCI slot is 133MB/sec. you may able to find turn it a bit more, but don't expect a big jump

Check this out
- Remove the CONTROLLER
- Connect direct to your MB's SATA port
- Configure the HDD as Dynamic drive
- Create a stripe volume out of it

I bet the new RAID0 would have much faster then the current setup.

Return the controller , have some cold one with the money :-)

Note: Back up your RAID0 data often
January 22, 2011 7:19:39 PM

I tried to run RAID of the MB in the past, it had issues with the boot drive.

I guess I can always upgrade the RAID card? Something like PCIe?
January 27, 2011 2:08:28 AM

I turned on the MB RAID and plugged the 2 drives into it.

It actually recognized my existing RAID 0. I did not have to rebuild it.

New numbers

HD Tune: AMD 2+0 Stripe/RAID0 Benchmark

Transfer Rate Minimum : 2.2 MB/sec
Transfer Rate Maximum : 221.6 MB/sec
Transfer Rate Average : 166.7 MB/sec
Access Time : 12.2 ms
Burst Rate : 132.8 MB/sec
CPU Usage : -1.0%
a b G Storage
January 31, 2011 11:51:09 PM


Generaly, speed is a function of number of spindle. meaning more drive faster speed...

If you have three drive to your Mobo, you would get more than 200MB/s average.
But note, the chance of loosing your data is triple. so
1- Back up as often as you coluld
2- Got hardware raid5 from DATOptic, HPT, Areca, ATTO... Depend how much you want to spend and how much you want to achieve

Also try to turn SATA mode in the BIOS to: AHCI or Enhance, you can get more speed out of it