[Bug 211713] NVME controller failure: resetting

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713

--- Comment #17 from MacLemon <bugs.freebsd.org at maclemon.at> ---
I've done some testing now on FreeBSD 11.0p3-RELEASE and 12.0-CURRENT.
I've tested two of these Samsung SM961/256GB in a SuperServer 5018D-FN4T with
SuperMicro AOC-SLG3-2M2.
I've done all possible combinations of the two SSDs in the 3 available M.2
slots of that combo.
I've also tried pretty much every combination of Legacy/BIOS/UEFI setting for
the PCIe slots to no avail.
The SSDs are recognized at all every few reboots, I never managed to get both
to show up. Using the oboard slot or the 2M2 card doesn't make any difference.
I did not manage to successfully initialize these SSDs let alone create a ZFS
Mirror from them to boot from.

Just for completeness I've tested them running Debian/Sid and they behave just
as unusable there.

I'll be returning these Samsung SSDs and try to get Toshiba X3 instead.

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