How about this:
yes "<char>" | dd of=/dev/sda bs=4k conv=notrunc
Substitute with character of your choice.
Question
I know i can fill an entire disk with 0x0 like this:
dd if=/dev/zero of=/dev/sda bs=4k conv=notrunc
Is there a way to fill the entire disk with a char of my choice?
La solution
How about this:
yes "<char>" | dd of=/dev/sda bs=4k conv=notrunc
Substitute with character of your choice.
Autres conseils
You can do it this way:
while true; do echo -n 'x'; done | dd of=/dev/sda bs=4k conv=notrunc iflag=fullblock
yes "" | tr "\n" "<char>" | dd of=/dev/sda <rest of dd parameters>
cat /dev/zero | tr "\0" "<char>" | dd of=/dev/sda <rest of dd parameters>
cat /dev/zero | sed "y/\0x00/<char>/" | dd of=/dev/sda <rest of dd parameters>
Where <char>
is your chosen character