I upgraded my Macbook's internal hard drive from a 400GB Western Digital Scorpio Blue to a 750GB Scorpio Blue and restored from Time Machine. Despite my energy saver settings, the new drive shuts down after only 15 seconds of inactivity! Then, when I try to do anything, I get greeted with the beach ball while the drive spins up. If I play a song (with the sound off), the HD never spins down; I have been doing this to prevent beach balls. The drive spins down within 10 seconds of stopping the song.
Here are the results of pmset:
~$ pmset -g Active Profiles: Battery Power -1 AC Power -1* Currently in use: womp 0 lidwake 1 halfdim 1 sms 1 hibernatefile /var/vm/sleepimage disksleep 0 sleep 45 hibernatemode 3 ttyskeepawake 1 displaysleep 10 acwake 0 autorestart 0
And, SpindownHD shows that the drive is always active, even though I can hear it shut down. Is this a bad disk? Is there something else I can try? Sorta related, is there a way to monitor hard drive RPM?