unmounting RAID doesn't stop it's drives from spinning

[liflaf]

So far nobody seems to know about this issue.

In addition to the standard 320GB HD I've put in two 750GB harddrives as striped RAID in my new macpro. This RAID I'm going to use strictly for video.

Since most of the time I use the Mac for things other than video editing, I was wondering if it is possible to force the two secondary drives (the RAID) to sleep. I would like to disable them without having to physically remove them.

"Unmounting" or "Ejecting" the RAID won't do: the separate drives keep spinning. After disabling the RAID, you can't eject or unmount these "RAID slices" in Disk Utility. At least, I don't know how to do that.

The best thing would be: possibility to disable these harddrives and having them stay enabled after a reboot. And whenever I feel like video editing, I enable them.

The "put the harddisk(s) to sleep when possible"-option in the energy saver I'd rather leave unchecked because I don't want to have the drives spinning up and down all the time.

Does somebody know how to do his?

Thanks! Pieter

 

[michaelsanford]

I would suggest enabling disk sleep, and using 'pmset' to specify the wait time. You could make it rather long and that should stop your main disk spinning down all the time.

sudo pmset -a disksleep MINUTES

Just type pmset in the terminal and you'll see a good list of commands and how to use them.