*sob* I read the question backwards... that is, "Which types of pages can be auto recovered..." I remember thinkings, wow... there must be a whole lot that can't be auto-recovered. Index pages aren't a problem, and I know PFS and GAM aren't. Hmmm... well, logically which two would most critically need to be recovered.
Doh! >< I must read the questions closer before answering.
I have to assume the 12% of people who also answered "Data" MUST have read it the same way. :-) (I will HAVE to choose to assume they read it that way...)