KVM/QEMU users - use Virtio and set cache as writeback for best disk I/o on W11 guests


jimbo45

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Hi folks
If you are using KVM/QEMU as a host for Windows Guests - you can improve the disk performance in some cases significantly by instead of opting for the standard AHCI SATA built in driver -- sel to Virtio and the cache to writeback as per :

Screenshot_20230801_091319.png

You can get the Virtio ISO for Windows --install on Guest of course) from the fedora site. The Virtio drivers act similarly to vmware tools or vbox additions in VMware and Oracle's Vbox additions.

You'll need to install on a Windows Guest and then clone to another one -- or add the drivers before installing windows as the standard windows install won't know about virtio disks until a driver is loaded.

Virtio here : latest version working OK - running fine on W11 Pro Canary build - latest build.


Cheers
jimbo
 

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