From the white paper I suspect the problem you face are all examples are of data that are on primary storage rather than in an Unity archive to tape ? In which case there seems to be a requirement to have a 'swing space', ie restore a subset to unity, migrate to isilon, repeat until complete, this is assuming unity ndmp backup can only be restored to unity. You might want to test whether you can restore to a windows or unix server. Why ? Can the either share or export isilon path to server and restore directly to that path. Try with a  small subset, if it works, then you have cut out a step and can increase the subset size ?
Hello All. Is Isilon ndmp is compatible with UNITY ndmp. We already are aware that - Isilon NDMP is not compatible with VNX. Where can I get the compatibility matrix on the above scenarios and few more details etc. Thank You.
Isilon NDMP