Niall, You might want to try specifying 'option window-size 2097152' in all your protocol (client and server) volumes. Also, you might also want read-ahead on the server (over iothreads) with the same page-size as the client, but higher page-count. avati 2008/3/16, Niall Dalton <nialldalton@xxxxxxx>: > > > On Mar 16, 2008, at 3:12 AM, Amar S. Tumballi wrote: > > > Hey, > > Just missed that 80GB file size part. Are you sure your disks are > > fast enough to write/read at more than 200MBps for uncached files? > > Can you run the dd directly on the backend and make sure you are > > getting enough disk speed? > > >