Beware... ML sets HDDs to sleep in Energy Saver

[netnothing]

I'm running a Mac Pro with 4 internal HDDs. After upgrading today I noticed there were times when I would select one of the drives in Finder....and I would beachball.

It wasn't until tonight when I was working in a quiet room that it happened again....this time however, I could hear the HDD spin up. Sure enough, I went to Energy Saver and ML set the option to "Put hard disks to sleep when possible".

I did NOT have this checked before.

Figured I'd just post this in case others have the slowdowns and can't figure out why.

-Kevin

 

[Sylon]

Thanks for the heads up.

 

[thatsmyfish]

Under SL and Lion, I would always leave handbrake running converting video files overnight or for a couple of days with the screen off. I've noticed under ML that the computer is constantly going to sleep despite my energy saver settings which are set to Never/Never. Any thoughts?

 

[sevimli]

Under SL and Lion, I would always leave handbrake running converting video files overnight or for a couple of days with the screen off. I've noticed under ML that the computer is constantly going to sleep despite my energy saver settings which are set to Never/Never. Any thoughts?

have you tried resetting the SMC?

 

[netnothing]

have you tried resetting the SMC?

Yup...I'd try that first:
http://support.apple.com/kb/HT3964

I've seen where resetting the PRAM has helped if the Mac WON'T stay asleep (or won't keep the screensaver on). You could try restting that as well:
http://support.apple.com/kb/HT1379

-Kevin

 

[thatsmyfish]

I'll try it right away- thank you. I had a battery replacement and updated Handbrake the same day as the ML upgrade so I was trying to isolate where the problem may have come from!