Finally had some time and available drives for more tests.
Abandoned hope of repairing existing drive/contents. Nothing worked.
Used humaxrw to move all files to a temp location on 1TB drive.
Majority of recordings have all associated files. Missing files seem to be the filename.hre
The HumaxRW Front-End tool seems fully successful in taking recordings both off and BACK ONTO the PVR-9300T despite what has been reported that it (well at least the humaxrw.exe underneath it) can not.
Good recordings moved off the old formatted drive to temp storage on pc can be moved back to it and everything is 100% on the 9300. Just as it was in all respects.
The recordings that were salvaged from the drive were all given filename recover_0001 and upwards despite having all associated files. This is going to be a pain even if only played on pc.
Moving these salvaged files back to humax drive results in playable recordings but no names or dates.
Editing a cloned hre file to match file number of the missing .ts hre allows file to be moved from pc to humax drive but does not result in a playable recording. It is missing in the PVR menu.
humaxrw lists the recording but strangely there is a big difference in the layout of name
right most end which is defaulted to drive name is separated from rest as if tabbed.
Is there a tool to recreate good .Hre files ? Or maybe an editor other than notepad that would let the clone/edit work.