I set up dd to clone a smaller system 40.00GB hard drive (/dev/sda) to a new bigger 111.00GB one connected via a USB reader (dev/sdb) and Its been going for two hours now. The activity meter on the new hard drive shows it's doing something. But the CPU is only about 20%. When is this thing going to complete? Should I re-start the process?
In the future, you should use
Important bits to notice: the
You can see how far it has got by sending it a SIGUSR1 signal. Find the process id using ps, e.g.
and send dd the SIGUSR1 signal:
and you will see how much data it has copied and the transfer rate.
For a copying activity you are limited by I/O speed of the device, so the CPU should not be fully loaded, so don't worry about that.
I had a similar problem. The cause was different in my case.
The target drive is an external hard disk.
If the disk was mounted automatically via
When I unmounted the hd and mounted it directly via