linux dd 本地挂载
dd if=/dev/zero of=/root/test.img bs=1M count=10 losetup /dev/loop0 /root/test.img mkfs.ext4 /dev/loop0 mount /dev/loop0 /data
dd if=/dev/zero of=/root/test.img bs=1M count=10 losetup /dev/loop0 /root/test.img mkfs.ext4 /dev/loop0 mount /dev/loop0 /data