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Date:      Tue, 10 Apr 2007 21:06:15 -0400
From:      Jules Gilbert <jules.stocks@gmail.com>
To:        Yuri Grebenkin <breath@unix.net>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Automatic means for spinning down disks available?
Message-ID:  <3B8A60E3-9600-47A5-934F-7DACB78F50B7@gmail.com>
In-Reply-To: <20070408221017.23f060ea.breath@unix.net>
References:  <46192C1B.4060706@u.washington.edu> <20070408221017.23f060ea.breath@unix.net>

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Boy, do I want answers too!

We have HD's that run 24X7.  And I don't want to turn them off, I  
just want them to sleep quietly until needed.  We have lot's of RAM,  
thus plenty of cache space.

Our machines are all blades.  (Does this matter?  I don't know.)   
IBMs and Super-Micros.

We spend zillions of bucks on electricity;  We use these machines  
24X7 now, but soon will only need them about 12 hours a day.  Is 24X7  
operation the optimal strategy?

What's the best course here, wrt electric costs, and wrt disk failures?

--jg



On Apr 8, 2007, at 2:10 PM, Yuri Grebenkin wrote:

> Just wonder if it's better for an HDD not to spindown at all.
> Maybe it's safer to spin in peace than to park/launch?
> What do you think?
>
>> Hello again all,
>> 	I was wondering if there was an automatic, and possibly timed  
>> means to
>> spin down disks available in either ports or the base system, by  
>> chance.
>> 	Just trying to cut down on energy use, and increase my disks'  
>> lives :).
>> TIA,
>> -Garrett
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