Comment 15 for bug 1716028

Kevin,
thanks again. You've provided enough support for me at this point. I had looked at trying to coalesce multiple -drive values into a single one, and that can definitely be made to work with the newer qemu, but i'm not sure I can make it work with older.

the goal there would be to do something like:
$ qemu-system-x86_64 \
   -drive id=d01,file.filename=disk1.img,format=qcow2,if=none -\
   -device virtio-blk,drive=d01,serial=s01 \
   -device virtio-blk,drive=d01,serial=s02

on newer qemu, that works if i change 'id=' to 'node-name', but on older qemu I can't convince it to let me have 1 drive associated to multiple -device.

What we ended up doing is at
  https://code.launchpad.net/~smoser/curtin/trunk.lp1716028-hack-file-locking-in-qemu/+merge/330456