[OmniOS-discuss] NVMe interface reliable?

[Geoff Nordli]

On 16-04-11 09:31 AM, Eric Sproul wrote:
> On Sun, Apr 10, 2016 at 8:54 PM, Geoff Nordli <geoffn at gnaa.net> wrote:
>> Is the NVMe interface reliable option now?
> I've tested it, and it works great.  However, a possible shortcoming
> is that there is currently no hot-swap support for nvme(7D) devices.
> This isn't an issue if you're doing the PCIe-card form-factor, as
> those generally don't get hot-swapped anyway, but is an issue for 2.5"
> disk form-factor devices.  These are physically capable of being
> hot-swapped (they use the same SFF connectors as SAS/SATA), and at
> least Intel says that their drives are "suprise-hot-plug-ready" [1].
> At this time, for any NVMe deployment, plan to shut down the system to
> perform drive replacements.
>
> That said, it sounds like a lot of folks are deploying these as cache
> and log devices, which is less critical for replacing than primary
> storage.
>
> It's unknown at this time whether nvme(7D) will gain hot-plug support.
> I'm not aware of anyone working on it (including the Nexenta engineer
> who wrote the current driver.)
>
> Eric
>
> [1] http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/333596-hot-plug-capability-nvme-ssds-paper.pdf

Thanks Eric.

On a mailing list people don't post their success that often so it takes 
a while before you get enough feedback before you trust it.