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SATA Controller Mode - X1 Extreme Gen 2

2020-02-14, 6:42 AM

I recently noticed the SATA Controller Mode in BIOS curretly set to "AHCI Mode" instead of Intel RST, but my X1 Extreme Gen 2 uses a Samsung 512GB M.2 NVMe SSD using PCIe.  My impression was that RST Mode allows you to take advantage of SSDs using PCIe and achieve better performance, but have also read that's only if you're using a RAID setup which I am not.  Would I gain anything by switching to RST mode or should I leave it in AHCI?


Side note: Not sure if it matters but the Intel RST driver does show up in Device Manager, even after manually downloading it from the Lenovo website.  I do see the "Microsoft Storage Spaces Controller" and "Standard NVMe Express Controller" under the Storage Controllers section though.


Any help or advice is appreciated, thanks.

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Re: SATA Controller Mode - X1 Extreme Gen 2

2020-02-14, 9:45 AM
As far as I know, you need RST only if you want to build a RAID setup.

Also to my knowledge you need to switch modes before installing windows, otherwise the OS won't boot anymore.

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Re: SATA Controller Mode - X1 Extreme Gen 2

2020-02-14, 12:27 PM

According to the user manual on page 39:


RST is required for enabling RAID, you'll always want to use AHCI otherwise.

If you want to enable RAID on your X1 Extreme Gen 2, you can follow the instructions in the user manual.

Kind regards,

Jonas Hendrickx

Lenovo Insider, Windows Insider MVP


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Re: SATA Controller Mode - X1 Extreme Gen 2

2020-02-14, 12:44 PM
Ok that's what I figured. Thanks.
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