So there was a flood. Whee. It was a pain to restore everything.
glitch and leningrad lost their nvram data. Took several tries for glitch's BIOS to actually boot the disk. I had to boot leningrad twice because I messed up when I reset the ethernet address.
I also forgot to turn on the external disks for autumn, so I had to reboot that. Luckily, all the network routes, DNS settings, and mounted disks came online via my changes to SYSTARTUP.COM. I still don't understand VMS bootup, though; it's taken me many tries to get that right.
The BIOS on ledge also complained about the built-in clock, but on the second boot it worked.
I think everything else came up fine, after the normal tweaks and boot commands, but I brought the systems up one at a time, because if I don't, all the simultaneous disk spin-ups tend to trip the surge protector, and everything shuts down again.