|That's because Netware 3.12 stores also physical informations about the hard drive to the volumes created on netware.|
That means, you can clone the complete hard drive of Netware to another hard drive of the same type and capacity.
The only way to manage this is to use ghost for netware, which is no longer available on the market.
You can setup a new Netware 3.12 server on the new hard drive. Then, connect the old hard drive to that system, mount the drive and copy all files to the new hard drive.