Startup drive missing from "About this Mac"

[ehofmeister]

Just tried resetting PRAM and selecting startup drive again: no luck. Tried booting from "Medium HD", erased "Macintosh HD" partition in Disk Utility and doing erase + restore: no luck.

The weird thing is that when I boot from the backup, the startup volume is listed correctly in the "About" tab. The original setup also did list it correctly. Only when I restore it goes missing altogether.

This is really unfortunate, because it makes me feel that I cannot trust my backups anymore, since SuperDuper says that everything is OK, but I can see that something is weird and not right.

I have no more ideas, I think I am going to do a clean install, although that is really, really annoying + how do I know this will not just happen again next time again?

Regards,

Esben