Am 03.02.2010 10:52, schrieb Sampsa Riikonen:
[...]
I am trying to do a backup using
dd if=/dev/sda of=/dev/sdb
[...] What I read from wikipedia, the speed of that is..
60 Mbytes (not bits) per second ~ 0.06 Gbytes per second
So this means that a 500 Gbytes hard disk should copy in aprox. 2.3 hours
.. but know it seems it takes more than 24 hours!
What seems to be the problem? Am I missing something in the math?
Yes, you have to use a larger block size "dd if=/dev/sda of=/dev/sdb bs=1M" should speed up your backup.
My external usb hard disk box has also an option to use an esata connector (but then I should buy an adaptor to my laptop), but the speed difference to usb 2.0 is not that big, I imagine..?
As far as I know esata can be much faster, but to get the higher speed, you have to use larger block sizes, too. Herbert -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org