INetDisk allows you to map disk or RAID arrays on a computer, but the source is a disk or an image file from another computer. You can use 3 types of access - full, protect or refuse. When you are connected to mapped disk it appears to the system as a local disk, therefore you can for example format or partition it.
Compared to iSCSI, INetDisk comes with Virtual Write technology. That means user may perform operations on that drive (like read, write etc.) but all those operations will only affect the user itself.