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.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f8b12e513b953aebf30f8ff7d2de9be7e024dbbe 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. >
