I also read the following VM snapshots currently have the following known limitations: They cannot cope with removable devices if they are removed or inserted after a snapshot is done. A few device drivers still have incomplete snapshot support so their state is not saved or restored properly (in particular USB).
I am using an ide0-hd0 device option with removable=0 and ro=0. Are there any additional options to be set? -- On Tue, Oct 19, 2010 at 8:51 AM, Ubuntu Explorer <ubuntuexplo...@gmail.com>wrote: > Thanks for your help. > > But, after commenting out snapshot option, I still cannot save the VM state > into the ide0-hd0 block device. > > Here is some more information about the problem. > > I am trying to do the following > a. info block > shows virtio, ide0-hd0 > b. savevm snapshot_name > c. info snapshots > Shows snapshot_name under virtio > d. commit ide0-hd0 > e. quit > f. Check timestamp of ide0 file - no change. ( I assume that qemu would > write something to this file) > g. restart qemu. > h. info snapshots > i. No snapshots in "virtio" > > I will try to run qemu in gdb mode to see why commit is not committing the > changes to the ide0-hd0 block device. > But any other information will be helpful as well. I have googled a lot > without much luck. > > Regards > UE. > > > On Mon, Oct 18, 2010 at 3:17 PM, Stefan Hajnoczi <stefa...@gmail.com>wrote: > >> On Mon, Oct 18, 2010 at 12:37 AM, Ubuntu Explorer >> <ubuntuexplo...@gmail.com> wrote: >> > I am trying to implement snapshot saving and loading from command line >> using >> > qemu. I am using both the drive and disk options as follows. >> > <qemu exe> \ >> > --disk <path to disk file> \ >> > ...other options \ >> > -drive file=<path to drive file>, >> > index=0,media=disk,snapshot=on,if=ide,type=drive,cache=writethrough >> >> Remove snapshot=on. See the documentation about -snapshot versus >> savevm snapshots: >> >> http://wiki.qemu.org/download/qemu-doc.html#vm_005fsnapshots >> >> "When using the (unrelated) -snapshot option (Snapshot mode), you can >> always make VM snapshots, but they are deleted as soon as you exit >> QEMU." >> >> Stefan >> > >
