Martin Kletzander <mkletzan@xxxxxxxxxx> > > I wonder if libvirt would be changed to accept > >"discard_granularity='0'" so the traditional hard-disk can be > >recognized under windows again. > > > > That should be possible, yes. Given the behaviour described above it > should be done (although it feels like there is something else that's > worth fixing, but I don't know what and where). Thanks a lot for the good news. it would be a lot easier to setup. > Could you file an upstream (or downstream) issue so that we do not lose > track of this? > > Upstream: https://gitlab.com/libvirt/libvirt/-/issues/new > Downstream: https://issues.redhat.com/secure/CreateIssue!default.jspa I will do that asap. > Based on whether it is taking time in the guest or in the host you could > theoretically try setting <driver name='qemu' discard='ignore'/> but I > guess that would not help. no it won't help. I had tried that before. I tried many parameters and also tried to set the "media type" manually at windows (the function seems only designed for storage pools, not normal devices). "discard_granularity=0" is the first parameter which is working. I am glad that it works. or I can only stay with very old drivers or replace virtio-blk with virtio-scsi. Regards, tbskyd