On Tue, Aug 27, 2013 at 11:31:28PM +0200, Paolo Bonzini wrote: > Il 27/08/2013 22:26, Erik Rull ha scritto: > > It's more a guess, there must be a > > change between 1.2.0 and 1.6.0 that prevents a simple Windows XP from > > booting completely, if the guest HDD image is placed on a SSD. On a > > rotating HDD (with the same commandline except the path to the image) it > > boots successfully. The only difference is the speed of the disk access. > > It could be a real difference, actually. An unexpectedly fast disk > might screw a sloppy driver. IIRC you're not the first person reporting > it. Stefan, do you think using block throttling could fix it (with some > trial and error)?
That might work. You could start with something like -drive ...,iops=20 and then disable the limit from the QEMU monitor once the guest OS is booting (block_set_io_throttle virtio0 0 0 0 0 0 0). It would be easier to try -drive ...,cache=writethrough and -win2k-hack first as Anthony suggests. Stefan
