Floppy disk

How do i duplicate disk in Linux ?
I have only one floppy drive. I think this is similar to diskcopy a: a: in dos environment. So I try this syntax…

copy from data disk to temp file
dd if=/dev/fd0 of=temp1

copy from to temp file to blank disk
dd if=temp1 of=/dev/fda

Do I need to set the block count ?
Is it correct about the syntax ?