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Old February 24, 2012, 02:20 PM
Join Date: Jul 2011
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Default Question about running SSD + HDD in either RAID or ACHI

Hi, I was wondering what is the difference between RAID and ACHI? I recently installed a SSD for booting and drivers and I also have a 500GB HDD that I want to use for storage of games and other stuff.

How do I set up my HDD as my primary storage? My SSD is my C drive and my HDD is currently my E drive and I currently have my SATA's on ACHI settings

Thank You.


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Old February 24, 2012, 03:08 PM
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RAID opens up a bios to allow drives to be combined.
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Old February 24, 2012, 04:02 PM
Join Date: Sep 2011
Location: Brockville, ON
Posts: 552

My System Specs


Umm, I do not believe there is a "primary" storage, that is something you need to setup.

Also, as soon as you set things to RAID alot of drives lose thier advanced features such as TRIM, BGC etc, though this is not nearly the problem it once was.

RAID requires identical drives to my knowledge, or at least identical capacity.
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Old February 24, 2012, 06:39 PM
Join Date: Jul 2011
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Ah alright. Thank you for the quick replies!!
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Old March 12, 2012, 04:45 PM
Join Date: Sep 2009
Location: Quebec City
Posts: 4

Identical capacity, technically yes, but certain motherboards with Intel chipsets can actually RAID different capacities' HDD/SSD (Intel Rapid Storage Technology, one called Matrix RAID I Believe).
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  #6 (permalink)  
Old April 9, 2012, 11:40 PM
Join Date: Mar 2010
Location: Vancouver
Posts: 36

So AHCI is preferred with a SSD drive.

What if you later add a SSD drive for Intel SRT to cache the HDD? So the setup becomes:
- Boot Drive: SSD #1
- Storage Drive: HDD
- SRT Drive: SSD #2

I understand you need to set it to RAID then, so do you lose TRIM for the SSD boot drive?
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