The way it's supposed to work (as I understand it): move iTunes Music folder to external hard drive, tell iTunes, unplug and travel the world and collect music (which is placed internal hard drive in ~/iTunes/iTunes Music), return home, use Consolidate Library to copy new stuff over to external, delete stuff from internal.
Except when I leave and go to work iTunes resets the location of the iTunes folder to point to the internal hard drive. So Consolidate Library does nothing. If I change the folder location to point back at the external hard drive it takes a good hour to churn through my 40k library while an annoying modal dialog box (Updating iTunes Library) makes iTunes block. (Note to others: if you start music playing it'll continue during this process.)
I'm posting because anyone who writes a blog about how to manage iTunes music on an external hard drive never mentions the "must repoint iTunes to external hard drive and start baking a pizza while you wait" step. Is this because I'm doing something wrong or because they've got a library of four Raffi records and they just don't notice the churn.
I mean, I know Apple folks don't seem to use their own products outside of their quiet offices, always connected to a high-speed LAN with unlimited internal hard drive space, but this can't be the best Cupertino could do...
/Sitting here, waiting for the Updating iTunes Library dialog box to go away... it'll only be another 40 minutes or so... Grrrrrr
[iTunes 7.6.2 on Mac OS X 10.5.3]