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Control hard drives' sleep interval and polling System 10.4
After installing CHUD (included in the Developer Tools), I found in a tiny utility called SpindownHD, located in /Developer -> Applications -> Performance Tools -> CHUD -> Hardware Tools folder. This useful program allows you to adjust hard disks' sleep and polling intervals, plus to see the status of the disks (Active, Idle, or Sleep).

[robg adds: I'd missed this well-buried utility, too. It allows more control over drive sleep than does Energy Saver, which offers simply on or off. I've set the sleep to 20 minutes, up from the default of 10.]
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Control hard drives' sleep interval and polling | 12 comments | Create New Account
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Can't find it
Authored by: shunker on Jun 17, '05 04:27:54PM

I did install the Developer Tools that came with the Tiger DVD, I do have the /Developer/Applications/Performance Tools/ folder, but there is no CHUD folder in it.



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Got it
Authored by: shunker on Jun 17, '05 04:42:13PM

Installed it from the Tiger DVD.



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Can't find it
Authored by: englabenny on Jun 17, '05 05:55:28PM

It's an optional install. Pop in the tiger disc, go to Xcode tools and run the install again -- customizing it to include CHUD.



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10.4: Control hard drives' sleep interval and polling
Authored by: zpjet on Jun 17, '05 05:41:36PM

now, could somebody please write a few words about polling? i believe it has something to do with journaled file system but in which scenarios would be worth to change the interval?



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10.4: Control hard drives' sleep interval and polling
Authored by: tobyvoss on Jun 20, '05 11:58:32AM

polling in the given context refers to the amount of time the SpindownHD program waits until it tries to detect new devices.
this can easily be seen when unchecking "Polling": the "last Update" time won't automatically increase anymore.
so this has nothing to do with your drive configuration or even journaling.



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Not a Tiger-only hint
Authored by: nemoinis on Jun 17, '05 05:59:41PM

This utility was already available in Panther's CHUD, and probably before then.



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Not a Tiger-only hint
Authored by: qwerty denzel on Jun 18, '05 02:06:21AM

Yes, this is not 10.4 only, it works in 10.3!



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Don't forget pmset
Authored by: Dr. Smoke on Jun 17, '05 06:38:46PM
One can get more control over the Energy Saver preferences, including hard drive sleep, using the pmset command.

There have been some significant changes in pmset from Panther to Tiger, i.e. more options and some commands have been deprecated but still work for the time being.

Be Seeing You...

Dr. Smoke
Author, Troubleshooting Mac® OS X

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10.4: Control hard drives' sleep interval and polling
Authored by: doneitner on Jun 18, '05 06:32:32PM

This tool only finds devices (HDDs and DVDs) connected to my built-in ATA controller on my PowerMac G4. It doesn't find my Serial-ATA drive (the one that I want to spin down becuase I use it less) connected to an add-in card. Has anyone else run into this and found a solution?



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10.4: Control hard drives' sleep interval and polling
Authored by: archinla on Jun 18, '05 06:39:20PM

is the sleep interval responsible for some or part of the damned spinning beachball problem? Tiger has been a waste of time as far as I'm concerned as I see the damn beachball far too often. I have 4 internal drives. This was also a problem in previous versions of OSX, but since installing Tiger it has gotten much worse. I have a G4 MDD, dual 1GHz w/1.75GB RAM. Any help in speeding up Tiger would be most appreciated, thanks.



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Control hard drives' sleep interval and polling
Authored by: paz on Jul 23, '07 11:02:02PM

For anyone referring to this tip as i was today, you don't have to completely reinstall xcode. You can select (on the os x cd inserted) Xcode tools > Packages >CHUD.pkg.



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Control hard drives' sleep interval and polling
Authored by: morespace54 on Jul 29, '07 06:07:53AM