Bug 1595931

Summary:	RFE: qemu: support for scsi-disk/ide rotation_rate
Product:	[Community] Virtualization Tools	Reporter:	Mai Ling <mailinglists35>
Component:	libvirt	Assignee:	Libvirt Maintainers <libvirt-maint>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	berrange, crobinso, eskultet, gscrivan, ko, libvirt-maint, nikolay
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Last Closed:	2020-10-05 10:21:08 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Mai Ling 2018-06-27 20:14:39 UTC

#1498042 has added support for telling the guest the rotation rate of drives.
I'd like to be able to use this with virt-xml.

[root@gw2 vmstore]# virt-xml gwwin --edit --disk rotation_rate=0                                                                                               ERROR    Unknown options ['rotation_rate']

Comment 1 Cole Robinson 2018-06-27 21:41:54 UTC

This needs to be exposed in libvirt first, so reassigning.

This is in qemu 2.11, patch posting was: https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg00697.html

Comment 2 Kevin Olbrich 2019-05-01 22:16:03 UTC

I would really like to see this implemented at the XML layer.
As far as I understand, VMs also get entropy from disks if they are rotating but don't when they are solid state drives.
Windows guests also behave differently if they detect SSD media (virtio-scsi with discard solves this mostly).

There seems to be a workaround (not tested):
https://serverfault.com/a/924717/453453

Comment 3 Erik Skultety 2020-10-05 10:21:08 UTC

Since this is now assigned to the libvirt component, there already is a product BZ tracking this feature, hence I'm closing this as a duplicate.

*** This bug has been marked as a duplicate of bug 1498955 ***