Bernhard Voelker wrote: > didier chavaroche wrote: > >Executing the "dd" command 23 time leads to transfert rate too low > > Just to be clear (as you didn't show us the commands executed): > how did you execute the dd command 23 times? > In parallel, e.g. a background processes?
I was wondering that as well. Without really knowing what you are doing if it were me not quite knowing what I was doing I might keep a copy of the source disk in a tmpfs ram file system and ensure there is enough ram to host it without swapping. That would reduce the I/O needed for the source reducing it to ram accesses. There is still a bottleneck on the outgoing I/O however. I expect that you are completely saturating the bus bandwidth. If I were doing that I would consider using multiple systems in order to gain parallel bus bandwidth. I would read the source data from the net and write to the multiple devices spread out over multiple systems. Bob
