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From: Chuck Swiger <cswiger@mac.com>
Date: Tue, 13 Feb 2007 10:58:34 -0800
To: deeptech71@gmail.com
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Cc: freebsd-questions@freebsd.org
Subject: Re: How can I manually turn off the HDD?
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On Feb 13, 2007, at 7:47 AM, deeptech71@gmail.com wrote:
> How can I turn off the HDD? .. and leave the buffers in the memory,  
> until the RAM is full .. then spin up the drive, write out the  
> data, then it turn off again.

ENOTSUPPORTED, at least with FreeBSD.  Note that Apple has done a lot  
of work to facilitate drive spindown for power-saving reasons for  
their laptops, so MacOS X will make a reasonable attempt to spindown  
the drives until really needed....

-- 
-Chuck