How to modify (add files or directories) to the qemu-img created raw disk file?

How to add files or directories to the

-img

created raw disk file. For example. I use

qemu-img create -f raw disk.raw 1G

to generate a

.raw

file. I want to copy some

/bin

,

/usr

directories to the

.raw

file. I have tried the following commands. With the reference to here

qemu-img create -f raw disk.raw 1G
mkdir /image
losetup /dev/loop0 disk.raw
fdisk /dev/loop0
    > n
    > p
    > ENTER
    > ENTER
    > ENTER
    > a
    > w
kpartx -a /dev/loop0
mount /dev/mapper/loop0p1 /image

However, the last commands output the following error messages:

: /image: wrong fs type, bad option, bad superblock on /dev/mapper/loop0p1, missing codepage or helper program, or other error.