Hi, Thank you for reporting about the corruptted 5.1.2 installation images. If you are going to install NetBSD on your DSM-G600, you have to choose 6.0_BETA installation set since 5.1.2 does not work for the model.
Category: port-sandpoint Synopsis: The 5.1.2 installation package is corrupted, like other files in the directory ... Responsible: port-sandpoint-maintainer ... Originator: Bduug Haresh Release: 5.1.2 ... Environment: DSM-G600
It'd be helpful for us when you are successful in running 6.0_BETA with your machine. Toru Nishimura / ALKYL Technology