Writing data to a raw disk using dd

barunparichha · 02-09-2012, 12:35 AM

Hi,
I have formatted my pen drive as a raw disk for testing purpose. How can I write data into that using dd ?

Regards,

fukawi1 · 02-09-2012, 12:50 AM

Have you tried searching the forum?
Or google?
http://www.linuxquestions.org/linux/...ything_With_DD
http://www.linuxquestions.org/questions/tags/dd/

barunparichha · 02-09-2012, 04:15 AM

Actually, I was trying to send few bytes of data directly, but seems dd takes either from file or direct h/w interface.

dd if=/dev/sdc of=new bs=11 count=1

where
if=i/p interface, file to be read
of=o/p interface or file to be written
bs= block size in bytes
count = no of blocks

With Thanks,
Barun

rknichols · 02-09-2012, 02:26 PM

If you don't specify an input interface, dd reads from stdin. The data does, after all, have to come from someplace. If you just want to write zeros, or perhaps something random, specify "if=/dev/zero" or "if=/dev/urandom", respectively.