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Re: Interesting qemu/virt-manager bug about the "rotational" attribute o

From: Dongli Zhang
Subject: Re: Interesting qemu/virt-manager bug about the "rotational" attribute on virtio-blk disks
Date: Thu, 16 Jul 2020 17:07:55 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

According to below commit, the virtio-blk used to be non-rot but it
(QUEUE_FLAG_NONROT/QUEUE_FLAG_VIRT) was removed due to some reason.


Dongli Zhang

On 7/16/20 1:06 AM, Richard W.M. Jones wrote:
> https://bugzilla.redhat.com/show_bug.cgi?id=1857515
> A virtio-blk disk which is backed by a raw file on an SSD,
> inside the guest shows rotational = 1.
> I assumed that qemu must have a "rotational" property for disks and
> this would be communicated by virtio to the guest, but qemu and virtio
> don't seem to have this.  Pretty surprising!  Is it called something
> other than "rotational"?
> Rich.

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