Re: [Qemu-devel] Adding Disk-Level Introspection to QEMU

[Wolfgang Richter]

On Wed, Apr 24, 2013 at 1:37 AM, Stefan Hajnoczi <address@hidden> 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 ?).