[mythtv-users] MythTV and LVM

[PAUL WILLIAMSON]

>>> rtsai1111 at comcast.net 01/31/06 11:13 AM >>>
> On Tue, Jan 31, 2006 at 09:54:39AM -0500, PAUL WILLIAMSON wrote:
>> I'm not sure what the motivator here is, but I haven't figure out a
>> way to spin down a drive in an LVM array.  Powering down an entire
>> PC for a month saved me a grand total of ~4 USD. I would suspect
>> powering down 1 drive might save you 3 dollars over the course of a
>> year.
>
>Was this a scientific experiment, or just a month-to-month utility
>bill comparison?
> 
>I received a Kill-A-Watt as a present and have been playing 
>around with it for a little bit. It reports my system as drawing 
>80W at idle.  At $0.18/kWH (as reported on my last few 
>electricity bills), this comes out to :
>
>	80W * 24hrs/day * 30days/mo * 1kW/1000W * $0.18/kWh = $10/mo
>
>and that's 80W at idle.

I used a Kill-A-Watt as well as observing the use on my electricity 
bill.  In June I moved all data from one of my servers to one that 
I have running all the time for mythtv, had been for about a year 
at that point.

>$10 barely covers lunch, but it's still more than double the $4 
>you cite. But then again, maybe electricity here (Boston, MA) 
>costs 2x more than in other parts of the US (which I can easily 
>believe).
>
>Throw in a second machine as an extra backend or frontend, 
>and now you're up to $20/mo just to power a machine that is 
>only actually inuse for a few hours per day ...

$10 a month might make my time worth while, but I'd probably 
spend more than 4 hours mucking around with it.  That's 4 hours 
I can be billable for other things, which eliminates any cost 
justification I might be able to pull off for a 2 year payoff, 
if my billable hourly rate is about $60.  Plus, that extra bit of 
heat generated by the computers is helping (very little) to 
heat my basement...

But, if you're about saving mother earth, this would be 
a worthwhile effort.

Paul