No need to reply. Out of impatience waiting for it to complete, I decided I'd just copy the last few remaining files to desktop and then copy them onto a different drive within the pool. Even though I wasn't sure how well storage pool would handle direct copy into it's hidden folders. That's when I realized that every time it hit one of Microsoft's backup 4GB blocks it would slow down to 0 and then error out as well.
As this drive wasn't one directly connected to the motherboard but an Intel SAS expanded I moved ports around and it told me what I already knew - the news is the gravest...
The irony, and incredibly funny part is when I added the drive that went bad I said to myself "if I add in more than is need now, I won't get around to this until it's too late".
Gots nobody to blame but meself. I just hope it's one of those 4GB files that takes an hour to recover from, instead of 2 days. With MSFT you really, never know... But hey! If we all followed best practices; all the time, half of us probably would have best-practiced ourselves out of a job, right?
After it's done repairing the backup database I'll set everything to duplicate. I promise. Yeah - I've also been saying I'm going to CrashPlan Free to the office. I haven't gotten around to that either.