[pve-devel] [PATCH pve-manager] Add "SSD" property to IDE, SATA, and SCSI hard drives

[Alexandre DERUMIER]

>>That's not the case—it's not enabled by default on any controller (my 
>>previous e-mail shows this for a guest with VirtIO SCSI), and virtio-blk 
>>doesn't even support the feature.

ok, didn't known, thanks.

So you have if it can improve ios in guest ?  Maybe some ioscheduler use this value ?
----- Mail original -----
De: "Nick Chevsky" <nchevsky at gmail.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Cc: "Thomas Lamprecht" <t.lamprecht at proxmox.com>
Envoyé: Mercredi 7 Novembre 2018 18:59:57
Objet: Re: [pve-devel] [PATCH pve-manager] Add "SSD" property to IDE, SATA, and SCSI hard drives

On Wed, Nov 7, 2018 at 12:36 PM Alexandre DERUMIER <aderumier at odiso.com> 
wrote: 

> if rotational is already always enabled by default on virtio-scsi && 
> virtio-blk, 
> why not enabled it by default for ide,sata,.... on next qemu version ? 
> (without any additional option). 
> 

That's not the case—it's not enabled by default on any controller (my 
previous e-mail shows this for a guest with VirtIO SCSI), and virtio-blk 
doesn't even support the feature. 

While emulating drives as solid-state could very well be a good *default* 
in the future, it should probably remain a setting because we don't want to 
change (and potentially break) people's existing guests. 

Nick 
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