On Thu, 21 Jul 2011 19:47:44 +1000 yudi v <yudi....@gmail.com> wrote:
> Hi > > I need to write random data to a partition before encrypting it. > Suggested way is to use urandom: > > #dd if=/dev/urandom of=/dev/sda2 > > What is the use of operand "bs" in the following case? I see the above > command executed as follows sometime: > > #dd if=/dev/urandom of=/dev/sda2 bs=1M > > For the hard drive I got, should I use the following command: > > #dd if=/dev/urandom of=/dev/sda2 bs=4096 > > >From what I understand, the first command above will write data in > >512 byte > blocks, the second one in 1MB blocks, and the third in 4096 byte > blocks. Right? > I am a bit confused about the usage of this operand in this case. > That is correct. They will both do effectively the same thing, however, the version with a larger block size will probably run faster on a modern machine. -- rbmj -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110721062827.419c9...@blairasus.mason.homeunix.org
