Dell XPS 8940 SATA and NVMe disk controller not recognized

[Valeri Galtsev]

> On Apr 3, 2021, at 2:37 PM, Barney Wolff <barney at databus.com> wrote:
> 
> On Sat, Apr 03, 2021 at 02:25:30PM -0500, Karl Dunn wrote:
>> I have new Dell XPS 8940 that came with Windows 10 Home installed.  I have 
>> created two partitions for FreeBSD, one on its NMVe 256GB SSD, and one on 
>> its WD 1TB HD.
>> 
>> For now, I have 12.2-RELEASE-p4 GENERIC on a USB memstick, so I can do 
>> some limited testing.
>> 
>> FreeBSD 12.2 does not recognize the SATA/RAID controller, which I assume 
>> is resposible (in Win10) for accising both drives.
>> 
>> The relevant pcoconf line for the controlleris:
>> 
>>  none7 at pci0:0:23:0: class=0x010400 card=0x09c51028 chip=0x06d68086 rev=0x00 hdr=0x00
>>     vendor     = 'Intel Corporation'
>>     class      = mass storage
>>     subclass   = RAID
> 
> See if the BIOS offers a choice of configuring the controller as SATA instead of RAID. That worked for me on an Inspiron 1180. (It also made W10 unbootable - apparently each OS occupies its own universe.)

That is what I do on laptops that come with Intel SATA chip configured for [fake] RAID “operation": I switch in BIOS/UEFI away from RAID to AHSI or IDE. But before doing that if you still want installed MS Windows to boot after switch, do this:

https://www.mysysadmintips.com/windows/clients/771-change-sata-operation-mode-from-raid-to-ahci-without-re-installing-windows

Valeri

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