Moving data dir to iscsi location

Hi all,

I would like to move the data dir to a iscsi location.
Currently, I’ve mounted properly the iscsi disk and I formated the disk as ext4 and mount in /storage giving the full permissions to www-data.
Even if I did all these steps, running the nc-datadir move, I got the error “Refusing to move to the SD card. Abort”.
Could you please help me?