> Sent: Friday, April 09, 2021 at 9:46 AM
> From: "José Abílio Matos" <jaoma...@gmail.com>
> To: users@lists.fedoraproject.org
> Subject: Re: M2 on laptop
>
> On Friday, April 9, 2021 1:11:01 AM WEST Greg Woods wrote:
> > Dell likes to configure the SSD as a RAID in the BIOS. Even though their
> > Windows installation is not using it as a RAID device.  When it is set to 
> > RAID in the BIOS, Linux cannot see it. For Linux to run, it must be set to
> > AHCI mode. In my relatively new Dell workstation, this is under System
> > Configuration -> SATA Operations.
> > 
> > It "should" be safe (all I can say is that it was for me) to go in and
> > verify that your SATA mode is set RAID (in which case this is likely the
> > cause of your problem), set it to AHCI, and then boot your Linux USB stick.
> > It should then see the SSD.
> > 
> > Unfortunately, Windows will now not boot unless you change it back to RAID.
> > If you were planning to keep the installed Windows system (which I wanted
> > to do), then there is a procedure you can Google for (it might have even
> > been referred to on this list) that will allow the Dell-installed Windows
> > to boot in non-RAID mode. I followed the directions and can now dual boot
> > Windows and Linux out of the GRUB menu.
> > 
> > --Greg
> 
> This is +1 message. :-)
> 
> Yesterday I had precisely the same issue and the solution that Greg stated 
> was 
> the solution. This was a Dell XPS 15.
> 
> In this case the windows version was erased so there was no need for the 
> workaround. Looking in the BIOS, in the storage section, was enough to see 
> that the chosen configuration was RAID, changing it to AHCI allowed the 
> installer to see the disk and to proceed with the installation.
> 
> Regards,
> -- 
> José Matos
> 

Finally can I expect to install a dual-boot by keeping the installed windows 
running after shrinking the 
original partition if I need?
These 2 comments do not seem to match together.
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