"Also sprach Peter T. Breuer:" > Seems that BLKBSZGET and BLKBSZSET do not work on amd64 (2.6.15.5) ... Well, those locals don't, but remote ioctls through enbd seem to be working now on amd 64 bit platforms. Hooray! Phew! One has to be sooo careful about the difference between long and int on 64 bit platforms. It's a miracle anything works. Peter