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Windows 7: Raid 0 + AHCI?

10 Jan 2011   #11
Golden

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Agreed, it looks great in benchmarks...but real world performance?????? With the OS and such, it's not about fast sustained writes, but rather fast random I/O...and the RAID configuration isn't helping in that area.
I think this sums it up nicely : from what I have read, the benefits from RAID'ing SSD's are negligible, especially from an OS standpoint given the majority of IO is read.

On mechnical platters, its a different story depending on your needs (I use RAID0 on mechanical drives for a very specific bit of work where the write activity is extremely high, and the benefit of RAID has been demonstrated to offset the risk).


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10 Jan 2011   #12
society misfit

Windows 7 Professional
 
 

Thanks for everyones input. The reason for the two 120GB drives was the cost. A local store had them on sale. A 240GB drive was just too expensive. I could have purchased 3 Corsair Force 120GB drives for the price of 1 240GB drive of the same model. And a single 120GB drive just wasnít enough disc space.

I ran DiskMark in IDE mode on 1 drive when I first got them. Obviously it out performed my current HDD but it was nowhere near what I expected (sorry I donít have that benchmark). Once I configured RAID the performance increase was amazing!!! Unfortunately I did not test in AHCI prior to setting up the RAID

Iíve yet to find any tests between AHCI and RAID0. But the ones Iíve seen between AHCI and IDE do not show that great of a performance increase

SSD Benchmark Tests: SATA IDE vs AHCI Mode | AHCI vs IDE,SSD,AHCI,IDE,SATA,Solid State Drive,Benchmark Performance SSD Testing AHCI vs IDE,Benchmark Performance SSD Testing: Intel ICH10 SATA AHCI vs IDE Mode Speed and IOPS Comparison

Iím quite happy with the performance I get out of my 2 SSDís in RAID 0 (yes i perform frequent backups), was just inquiring if I could squeeze any more performance out of my set up if I could set AHCI with RAID. Not to mention I was a little puzzled with this AHCI stuff!! Thanks again.

Below is my CrystalDiskMark results.


Attached Images
 
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11 Jan 2011   #13
Golden

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64
 
 

Hey, at least it works

I'd be quite interested to compare your results to some that I have, using the winsat Windows command like this:

1. Open an elevated Command Prompt
- Start Orb, type cmd in search box, righ-click on cmd and click Open as administrator
2. Type winsat disk
3. Take screencapture of result and upload here.

Regards,
Golden
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11 Jan 2011   #14
society misfit

Windows 7 Professional
 
 

Quote   Quote: Originally Posted by Golden View Post
Hey, at least it works

I'd be quite interested to compare your results to some that I have, using the winsat Windows command like this:

1. Open an elevated Command Prompt
- Start Orb, type cmd in search box, righ-click on cmd and click Open as administrator
2. Type winsat disk
3. Take screencapture of result and upload here.

Regards,
Golden
Here ya go! Would you mind posting yours as well for comparison? Thanks


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11 Jan 2011   #15
Golden

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64
 
 

This is my single ACHI connected OCZ Vertex2 60GB SSD, and my 2 x Samsung F3 SpinPoints in RAID0.

See any significant difference between RAID'ing and not RAID'ing SSD's?


Attached Images
  
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11 Jan 2011   #16
society misfit

Windows 7 Professional
 
 

Not sure what Iím comparing here. By the looks of it a SSD in RAID0 compared to a 7200 HDD in RAID0 shows a difference across the board. However, a SSD in RAID0 compared to a SSD in AHCI shows advantages in both formats. But we are comparing 2 different drives so itís hard to tell the advantages of either or. I ran that test on a WD 1TB Green driveÖtoo pitiful to even post! But it works great as a storage/backup drive.

My post was inquiring if AHCI could be turned on with a RAID config only because of all the SSD tweaks Iíve read on the net. Some do mention RAID but donít go into detailÖhence my confusion. Iím quite happy with my RAID0 set up. It performs like anything Iíve ever experienced on a PC. Im not too concerned about the risk everyone goes on about with RAID0. IMO a single drive in non RAID is at the same amount of risk as 2 drives in RAID0. You lose one you lose it all!!!! Besides I do perform frequent backups of my files.

Thanks again.
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11 Jan 2011   #17
Golden

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64
 
 

Hi,

Sorry, I seem to have caused confusion by posting my mechanical RAID setup in addition to my SSD setup - ignore that RAID one for the time being. I put it up there for an additional comparison.

You should be comparing your SSD result (your image) against my SSD result (my first image) - I don't see a significant difference between them.

You have a choice of either ACHI or RAID, but not both.

Regards,
Golden
My System SpecsSystem Spec
22 Sep 2011   #18
Lorider

Windows 7 Home Premium 64bit
 
 
Raid vs ahci

I Have two PCs that I build using the same Circuit board Asus P5K-E one of em Raid0 the other AHCI, the RAID 0 is much faster for editing video and working with large files, I always backup my system. epically the RAID 0 !!
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 Raid 0 + AHCI?




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