With a new AC adapter, the fireproof disk drive is back in action and connected to the new file server, and I've migrated the script for mirroring important data to it.
This reminds me that I should review the backup procedures for the rent-a-server, and make sure I'm really keeping all the important stuff safe, Just In Case. Should be stuffing regular Subversion snapshots into alternative storage, at a minimum; the various working copies are not sufficient insurance.
While I was fiddling around, I found some exceedingly outdated (and entirely redundant) stuff I could delete, thereby freeing up space for current backups. There's quite a bit of other clutter that should really be stored off-line, or just discarded. (Hm. I think there's still a fair amount of space on the pocket drive that's supposed to go in the safe deposit box soon; maybe I should sweep the archives onto that. Maybe I should get that started now, while I'm thinking about it.)
Additional: Now I remember that I also want to plug the various printers (laser, inkjet, label) into the new box, and make it the print server, if only because it's running the latest release of Debian, and therefore has the most nearly current CUPS, drivers, etc.
So... order a new USB hub from Amazon. USB 3.0, 7 ports, so there's plenty of room for plugging in other things (such as external hard drives, for which 3.0 is preferred nowadays). The stubby little machine doesn't have a lot of ports on it, so a hub seems a good idea.
Update: Much ancient-and-redundant clutter now resides exclusively on the goes-to-the-bank pocket drive, plus the various other places it's been archived over the years, wherever those may be. The fireproof drive is now well under half full, so no need to shop for a larger drive to stuff in the housing just yet.
One of these days, I really ought to clean up the various iterations of my home directory in its various locations. Could probably lose a great many gigabytes of obsolete and/or redundant stuff.
And, in the new year, I really should set up some sort of cloud backup, for both the home fileserver and the rent-a-server. The latter will require writing some scripts, as there are things that can't be backed up directly just by copying the filesystem (the fileserver will eventually need some similar scripts for similar reasons).