i have the exact same problem as you with the exact same setup: i built a new rig with xp on my old HD and vista home on the new one
i don't want to get rid of xp because there's too much crap on there i want
i just chalk it up to vista bugs and try to ignore it until i finish downloading sp1 and hope that fixes it...oh, wait a minute...i can't download sp1 because i get the dreaded 80073712 error code...
ohio_grad_06 might have the solution. It hurts to even say that, go IU!
Any way, here is what I did.
1. While in Vista go to the computer tab and right click the HD with XP.
2. Scroll down and click on Properties
3. At the bottom of the properties tab there is a box with a check in it. "Index this drive for faster searching." Take the check out and click apply then ok.
It takes a while to remove all the files from the indexing service but I've gone 15 minutes now without that HD powering up and down. It use to happen every minute.
Good luck.
------------------------------Yes, I've calibrated SpeedFan!
Reply to Dunkel
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.