On Wed, Apr 24, 2013 at 1:37 AM, Stefan Hajnoczi <stefa...@gmail.com> wrote:
> I think what you really want is a "tap" block driver which mirrors > writes to a target device (typically a NBD volume). You can model this > on blkverify or check out Benoit Canet's quorum patches. > > Stefan > An interesting thought, what we're basically talking about now is a "RAID 1" block device exposed by QEMU (no OS support needed). I think (?) it could have wider applicability than just introspection, and it could someday be extended to other forms of RAID. I think I'll implement such a block device, unsure of what to call it (blkraid ?).
