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Date:      Tue, 6 May 2025 00:54:49 -0400
From:      Charles Sprickman <spork@bway.net>
To:        freebsd-stable@freebsd.org
Subject:   NVMe  (U.2) hot-swap support status?
Message-ID:  <2E8A7BC6-6C3F-431F-B6F0-2611577B8028@bway.net>

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Hello all,

I'm not sure where to go with questions these days, most of the mail =
archives look pretty quiet and I didn't see one focused on storage =
(maybe -scsi?). The forums seem active enough, but maybe more home user =
focused?

Anyhow, we're trying purchase a few servers (likely this Supermicro: =
https://www.supermicro.com/en/products/system/UP/1U/SYS-111E-WR) and =
since manufacturers don't seem to validate for FreeBSD these days, I was =
hoping for some community input.

Last time I looked into this NVMe (specifically the "U.2" format for =
servers that includes hot swap) was supported in FreeBSD but hot swap =
was kind of iffy. I don't think too many FreeBSD users/developers at =
that time had the hardware, most people seemed to just be using an =
on-board NVMe drive on desktop or laptop systems, and there's not any =
real call for hot swap in that segment.

I have a thread on the forums linked below, but really what I'm looking =
to find is some larger orgs that are running NVMe drives and can confirm =
hot swap works as expected, if there's any gotchas to be on the lookout =
for, etc. Trying not to overcomplicate it, but we don't want to be stuck =
with a bunch of servers that might be less stable than our current =
SAS/SATA servers. We exclusively use ZFS, if that's useful info.

Let me know if there's another list I should be bringing this too, it's =
been a long time since I posted to a FreeBSD list.

Thanks!

Charles

=
https://forums.freebsd.org/threads/server-u-2-nvme-hot-swap-support-status=
.97588/





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