11:27 Friday 05 May 2017 JST
While trying to fix the backup process, I destroyed the database by overwriting with data from April 20th.
Had a good cry, and now am restoring the data from a 1GB backup file.
(It’s this file that I guessed would be troublesome in a restore process, so I wanted to break it up into bits. Now we get to do the restore starting with this file.)
Thank goodness it’s Golden Week.
I contacted AWS support at 11:02am, and now at 11:40 the restore is in progress. Thank goodness for DS’s calm and understanding demeanor…. (plus understanding of the system!) to help me get going quickly.
11:44 Friday 05 May 2017 JST
Finished, and confirmed.