Re: Why isn't the "Support Intel AHCI remapped NVMe devices" in mainline?

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Good evening,

you mean https://lkml.org/lkml/2019/6/20/27 /
https://lore.kernel.org/linux-pci/20190620061038.GA20564@xxxxxx/T/ ,
right? And yes, I have this problem as well. On a Toshiba z20t-c, and
this device has no option to switch this off. And even if has, there is
the problem that this device has no "normal" NVMe driver in the uefi it
seems, so it could not boot from...

Best regards,
Michael Fritscher

Am 31.12.19 um 18:26 schrieb David F.:
> Was actually referring to the "Intel AHCI remapped NVMe devices Patch"
> that exists but now out of date because of updates to NVMe/PCI driver.
> The latest was based on 5.2 I believe.
> 
> On Sun, Dec 15, 2019 at 7:57 AM Andrew R <junkbustr@xxxxxxxxx> wrote:
>>
>>
>> On Fri, Dec 13, 2019, 20:15 David F. <df7729@xxxxxxxxx> wrote:
>>>
>>> Hi,
>>>
>>> Despite not liking what Intel did, there isn't any reason Linux
>>> shouldn't support these devices in RAID mode..   The main support
>>> issues with our Linux based product is now this problem with no hard
>>> drives listed in Linux.   Get a couple everyday.  Some people can't
>>> change to AHCI mode, such as some Lenovo machines.
>>>
>>> If the patch simply adds support for this mode without affecting
>>> anything when not in that mode then why wouldn't you mainline it?
>>> This problem is widespread.
>>>
>>> TIA
>>
>>
>> Not sure if this is your issue, but had a similar issue with an HP machine that I bought with mirrored 512gb NVME drives configured from the factory. They were configured with the Intel Rapidstore embedded raid on the motherboard. In this configuration, the drives are not detected by the kernel.
>>
>> I had to go into the RAID configuration menu in the bios and release the drives from the raid (deleting Windows) at which point Linux could see the drives.
>>
>> In my particular case I was not installing Linux on this machine but was using Linux to create image backups of the Windows install using imaging tools from the Clonezilla distro.
>>
>> After destroying the RAID, I used the HP system recovery to create a base install and then setup drive mirroring in Windows Disk Manager (*not* Storage Spaces!). NB this requires Windows Professional...
>>
>> HTH.




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