I finally got a reply from my support ticket - 48 hours later. It basically says:
"We are continuing to work on it. The goes in thingie is not very fast and the goes out thingie is just as slow. NO ETA for completion. Very sorry blah blah blah."
Very frustrating. I wonder how many users are on thrasher? How big is the RAID?
Does anyone have a recommendation of another provider that has better service? I generally like DreamHost ... I've been using their service for 9 years! I really don't want to change ... but really! I suspect most of us on thrasher have been with DreamHost for a long time.
Warning to the rest of you - DreamHost seems to be fragile and not prepared for (some) hardware failures.
I will be interested to see how they deal with us after this is all fixed up!