mount: mounting /dev/loop0 on /mount_dir failed: Invalid argument

[ash1412]

Hi,

I am getting error while mounting loop dev over mount_dir.

my step as follows:

#mkdir /mount_dir

#mount -o loop /mount_dir

mount: mounting /dev/loop0 on /mount_dir failed: Invalid argument

[T2R]

Flag -o is for options and you didn't give any option.
You can try something like this: sudo mount -R loop /mount_dir.
Also you can check in manual (in terminal type: man mount) to see which flag is for what.