El 16/5/19 a las 8:57, Alexandre DERUMIER escribió:
>>> but all Windows >= 8 or >= 2012 support it for sure, so we could enable it
>>> for
>>> those.
> yes indeed.
>
>>> If I read the table correctly then 512e is even "more" supported (older
>>> ones with service pack or KB) as 4K native.
>
> I don't known if we can switch an existing disk without need to reformat ?
> maybe 512e will work (logical 512, same than 512n)?
>
>
>>> Some benchmarks would be great/interesting, and naturally a patch too :-)
> I have some heavy mssql databases on my ceph nvme cluster,I'll try to bench
> them.
> I'll send a patch today or tomorrow.
Hi Alexander, did you do benchmarks? Any conclusions you can share?
Best regards.
>
>
>
>
> ----- Mail original -----
> De: "Thomas Lamprecht" <t.lampre...@proxmox.com>
> À: "pve-devel" <pve-devel@pve.proxmox.com>, "aderumier"
> <aderum...@odiso.com>, "dietmar" <diet...@proxmox.com>
> Envoyé: Jeudi 16 Mai 2019 08:47:22
> Objet: Re: [pve-devel] qemu : add disk option for physical/logical block
> (could improve windows guest performance wit ceph)
>
> On 5/16/19 8:40 AM, Alexandre DERUMIER wrote:
>>>> Sounds like a good idea. Maybe we can even set a better default (512e)?
>>
>> don't seem to works with all windows version (including KB on some versions)
>> https://support.microsoft.com/en-us/help/2510009/microsoft-support-policy-for-4k-sector-hard-drives-in-windows
>>
>
> but all Windows >= 8 or >= 2012 support it for sure, so we could enable it
> for
> those. If I read the table correctly then 512e is even "more" supported
> (older
> ones with service pack or KB) as 4K native.
>
> Some benchmarks would be great/interesting, and naturally a patch too :-)
>
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