Thanks for all the help. We just got a new eHDD from Memory Express (which I recommend to anybody in Vancouver, Alberta or Winnipeg, it was worth the 3 hour trip), which they even set up. Fortunately, we were able to save a number of shows that were left that were still on the 630 itself. The new eHDD contains 2 TB's (actually 1.8 TB according to the info when plugged in), which is an improvement over the 1 TB one that crashed and burned.
And now it's working perfectly fine, and hasn't crashed since the new one was plugged in (although it is interesting to know that PVRs and eHDD actually take up very little energy, you do learn something everyday), and doesn't even delay.
On another note, we found out that the old eHDD was made in 2006, despite being bought in 2010, so I wouldn't have been surprised if it was refurbished or something.
Still once again, thanks for all the help.