On Fri, Jun 10, 2011 at 09:41:50AM -0400, Mikulas Patocka wrote: > This works if the data is directly on the partition, but it won't work on > the device mapper (if MD is on the device mapper, it won't work too). > > The device mapper has no function to tell where the bio is finally > remapped, so you can't read disk statistics for that particular disk. ok, thx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
