I've done some googling but a lot of the drives mentioned are either bigger than I need or no longer available or both.
I'm not really looking to increase capacity, or not by a lot, 500GB would probably be ideal. I delete 95% of recordings after one viewing and copy off anything I want to keep permanently.
Reason I'm looking at replacement is bad blocks found on existing drive (after a bit of a struggle with fix-disk and e2fsck).
Any other relevant comments, besides hdd recommendations, also welcome.