Re: M2 NVME support

andy thomas wrote:
> On Thu, 13 Apr 2023, Thierry Thomas wrote:
> 
>> Le jeu. 13 avr. 23 ? 13:25:36 +0200, egoitz@ramattack.net
>> <egoitz@ramattack.net>
>> ?crivait :
>>
>>> Hi!,
>>
>> Hello,
>>
>>> We are in the process of buying new hardware for use with FreeBSD and
>>> ZFS. We are planning whether to buy M2 NVME disks or just SATA SSD disks
>>> (probably Samsung PM* ones). How is you experience with them?. Do you
>>> recommend one over the another?. Is perhaps better support from some of
>>> them from a specificic version to newer?. Or do they perhaps work better
>>> with some specific disk controller?.
>>
>> I have a bad experience, the problem seems to be caused by the driver.
>>
>> See <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270409>.
> 
> I thought I would mention I have been using a WD Blue SA510 250GB M2
> NVME SSD mounted on a PCIe to NVME adapter card under FBSD 13.1 for some
> months now with no problems or any special drivers being installed.

Only it looks like it's actually SATA and not NVMe, based on the output?

> The server is a Dell PowerEdge 430 1U server fitted with four SATA disks
> in a ZFS pool, with a 4 GB partition on each disk being used for the
> swap (since using SSDs for swap space can wear them out quite quickly).
> 
> Attached is a screenshot showing FreeBSD version, the NVME SSD type,
> mounted SSD partitions, the server make & model and some info about the
> spinning disks too (there is a known issue with the built-in Megaraid
> driver in the FreeBSD 13.1 kernel not working with the camcontrol
> utility nor converting disk device names like /dev/mfisyspd0 to
> traditional names such as /dev/ada0 but these controllers & disks do
> work with FBSD 13.1 as you cna see from the zpool output).