How can I manually turn off the HDD?

[Chuck Swiger]

On Feb 13, 2007, at 7:47 AM, deeptech71 at 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