Many years ago I worked with Data General minis running AOS/VS. We asked one of DG's gurus if there was a way to undelete a file, and he said that the best bet

Many years ago I worked with Data General minis running AOS/VS. We asked one of DG's gurus if there was a way to undelete a file, and he said that the best bet was to crash the system at once, and see whether FIXUP brought it back.