support of PCIe NVME drives

[Mel Pilgrim]

On 2020-04-16 11:12, Miroslav Lachman wrote:
> Kurt Jaeger wrote on 04/16/2020 20:07:
>> Hi!
>>
>>> I was requested to install FreeBSD 11.3 on a new Dell machine with 
>>> only 2
>>> NVME drives in ZFS mirror. The problem is that installer does not see 
>>> the
>>> drives. Are there any special procedure to use NVME drives for
>>> installation a later for booting?
>>
>> I use 2 NVMe drives as zfs mirror to boot from on my testbox,
>> but it runs CURRENT, since approx. November 2018.
>>
>> So maybe try it with 12.1 ? I know, that does not help if you are asked
>> to install 11.3, but at least it gives you an idea...
>>
> 
> I tried 12.1 few minutes ago but the result is the same - no NVME drives 
> listed.
> Should I try something with kernel modules, some sysctl tweaks?
> Should I try UEFI boot? (I never did)

Make sure the UEFI BIOS can see them and enable dual-mode or UEFI-only 
boot. IIRC I couldn't legacy boot from the NVME drives.

My home and work servers have UEFI-boot gptzfsboot/root-on-zfs NVME 
drives that initially started with 11.2 and now run 12.1.