The data sync finally finished. A total of 6 days to transfer 845 gigs of data. Not really speedy, but at least it’s all back online. Most of what I was copying was Time Machine vaults, so I was not too concerned. I was able to point the mac clients at the new vaults and all the history was there. Hurray for small wonders.
Now I will work on creating my secondary data syncs so that it will be easier the next time. I will perform some speed tests to try and find out why the Drobo’s can’t get full speed.