Re: Rebooting and HDD spinup / spindown cycles [WAS: Re: Debian Wheezy - HP Pavilion dm1]
On Tue, 22 Oct 2013 02:56:12 +0200
Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:
> On Mon, 2013-10-21 at 20:33 -0400, Celejar wrote:
> > On Mon, 21 Oct 2013 10:54:57 +0200
> > Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:
> >
> > > On Sun, 2013-10-20 at 18:44 -0400, Celejar wrote:
> > > > On Sun, 20 Oct 2013 20:15:06 +0200
> > > > Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:
> > > >
> > > > ...
> > > >
> > > > > Each time you reboot, you harm your HDDs.
> > > >
> > > > You do?
> > >
> > > Everybody does. The spin downs and spin ups are a mechanical strain.
> > > This is what cause the most often death of HDDs after a few years.
> >
> > Not sure I buy this - my understanding is that modern HDDs are
> > typically rated for several 100,000 spinup / spindown cycles, so while
> > I suppose that it's technically true that each cycle brings the drive
> > closer to failure, I'm not sure that it's really reasonable to worry
> > about things like several hundred or so additional reboots a year.
> >
> > Keyboard keys are also rated to last for some number of keypresses
> > (several 10,000,000) - should we warn people that every keypress harms
> > their keyboards? You might want to rethink the length of some of your
> > emails ;)
>
> 5 reboots a day = 10 cycles
> 10 cycles * 365 days = 3650 cycles
> 3650 cycles * 10 years = 36500 cycles
>
> I've got doubts that the click click click death will happen after
> several 100000 cycles. It likely will happen before 36500 cycles. I do
Do you have reason to believe this, or a source, or are you just
expressing your opinion, unshackled by facts and data?
> not reboot 5 times each day, but I don't expect that my drives will
> survive for more than 10 years.
Quite likely not, but who said that that will be due to excessive
spinups / spindowns?
FWIW, my ThinkPad T61 Hitachi's Load_Cycle_Count currently reads
700734 ...
Celejar
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