Permissions were fine on all volumes. No problems/repairs needed on the internal volumes. The small external was in perfect order. However, DU has been displaying "Estimated time: 7 minutes" for the last hour.
Most of the time, there were reports of files that were out of order or that were being repaired. Just before opening this TS window, the scrolling stopped showing several orphaned files and "Indirect node 9992093 needs link count adjustment." That's fine with me, I have nothing against Indirect node 9992093. I think it is just as nice as node 9992092 and 9992094. Can occasionally hear some disk noises. Nothing is locked up. Force Quit and Activity Monitor agree that DU is behaving normally, if extremely slowly. DU is using a constant 1.1% of cpu cycles running 5 threads, messages sent is increasing, Virtual Memory is steady at 465.68. Report details scrolling again, mostly orphaned files, Indirect node adjustments, invalid first link in hard drive and a few "Whada you lookin at?!" lines.
OK, I finally found something that needs more cpu cycles than Folding@Home will part with. I paused those processes and DU cpu usage jumped to 98+%. Obviously some work going on behind the scenes, working on the 856.1GB volume!
Still showing seven minutes remaining, but I'm not about to "Stop Repair" much less "Force Quit!"
I doubt, however, that I will do this repair after so long a delay between this and the next one...