Re: Shut down or leave on?

["Mike" <mikewk147@oh.rr.com>]

----- Original Message ----- 
From: "Raquel" <raquel@thericehouse.net>
To: <debian-user@lists.debian.org>
Sent: Tuesday, August 28, 2007 1:50 PM
Subject: Re: Shut down or leave on?


> On Tue, 28 Aug 2007 09:45:51 -0700
> Jeff <debian@waysoft.com> wrote:
>
> > Raquel wrote:
> > > On Tue, 28 Aug 2007 11:28:35 -0400
> > > "Richard Carter" <carter.r.a.l@gmail.com> wrote:
> > >
> > >> Hi Folks,
> > >>
> > >> Is it better to leave a system running all the time or is it
> > >> better to shut it down over night, on weekends, holidays etc?
> > >>
>
> <snip>
>
> > >>
> > >> I'd appreciate your advice.
> > >>
> > >> Robin Carter
> > >>
> > >
> > > I've always gone for leaving my machines on.  I feel there is
> > > less wear and tear on components by leaving the machine on.
> > >
> > Specifically, as I understand it, thermal shock to minuscule
> > electronic  components during power-on.  In the past, I've lost a
> > number of  motherboards and processors due (presumably) to this
> > effect.  Since  keeping my machines on 24/7 (for several years
> > now), I have not had any  such problems.
> >
> > Jeff
>
> I also understand that when the hard disks get power that the
> platters torque just a tad, if not causing heads to come into
> contact with the platter, at least causing wear on bearings.

The stress created during the cool down and heat up cycle, between powering 
off and powering on, can cause microfractures in the solid state components. 
Further, on the lower quality powersupplies, the power on sequence can cause 
current surges that can also weaken electronic components, although the 
filtering in the present day switching powersupplies is supposed to 
eliminate this.  The amount electricity usage from present day devices is 
minimal compared to replacement costs for those devices.  I say, leave it 
on.

-mike

> --
> Raquel
> ============================================================
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>
>
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