Date: Wed, 11 Apr 2007 11:59:41 -0700 From: Gary Kline <kline@tao.thought.org> To: Jules Gilbert <jules.stocks@gmail.com> Cc: Yuri Grebenkin <breath@unix.net>, freebsd-questions@freebsd.org Subject: Re: Automatic means for spinning down disks available? Message-ID: <20070411185941.GA42753@thought.org> In-Reply-To: <3B8A60E3-9600-47A5-934F-7DACB78F50B7@gmail.com> References: <46192C1B.4060706@u.washington.edu> <20070408221017.23f060ea.breath@unix.net> <3B8A60E3-9600-47A5-934F-7DACB78F50B7@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Apr 10, 2007 at 09:06:15PM -0400, Jules Gilbert wrote:
> 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?
>
Re disc failures, I recommend investing as many hours/days as
necessay to decide what it (abs) critical. Config files from
as many lcations as reqired, e.g. If you have a tape drive,
copy the critical files there. Buy as many 200-300GB dics as
required to cross-backup your important, but not necessarily
critical files. And cron ssh backups N times daily... N >=1.
(I bup some files twice a day.)
Power is not going to do anything but get more costly; at the
same time, if you lost all your data in a *poof*, how much would
you be willing to pay to have things back?
--A parenthetical note: yes, cross-backing up does pay off.
Recently, I mv'd a file (innocently, I thought) *over* another
files and lost a few hour technical work. LUCKILY, I had the
original file on my laptop!!!! {Whew} I almost lways save mods
by RCS { ci -l <foo>}... but .... --
> --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
> >_______________________________________________
> >freebsd-questions@freebsd.org mailing list
> >http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> >To unsubscribe, send any mail to "freebsd-questions-
> >unsubscribe@freebsd.org"
>
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
--
Gary Kline kline@thought.org www.thought.org Public Service Unix
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070411185941.GA42753>