Date: Thu, 21 Oct 2010 16:35:06 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Bruce Cran <bruce@cran.org.uk> Cc: Alexander Best <arundel@freebsd.org>, mav@freebsd.org, Tijl Coosemans <tijl@coosemans.org>, Oliver Fromme <olli@lurza.secnetix.de>, freebsd-hackers@freebsd.org Subject: Re: Summary: Re: Spin down HDD after disk sync or before power off Message-ID: <86vd4v7gx1.fsf@ds4.des.no> In-Reply-To: <20101021135442.000054c9@unknown> (Bruce Cran's message of "Thu, 21 Oct 2010 13:54:42 %2B0100") References: <201009161742.24228.tijl@coosemans.org> <201009161619.o8GGJAmv035378@lurza.secnetix.de> <20101018155944.GA12425@freebsd.org> <868w1r92rf.fsf@ds4.des.no> <20101021122110.GA65490@freebsd.org> <86zku77mj6.fsf@ds4.des.no> <20101021135442.000054c9@unknown>
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Bruce Cran <bruce@cran.org.uk> writes: > Do we think our users are silly enough to set a short timeout of just a > few minutes? I'd think most would use a setting of 20-30 minutes at > a minimum. I never did understand why there were so many warnings; > after all, some laptops even come with a default APM scheme in their > HDDs that powers the disk down after 7 seconds! Really? That would make the system close to unusable, and the disk's life expectancy would be reduced to a few months; a disk that performs two load / unload cycles per minute on average will need replacing after three to six months. Remember, there was a huge flap a couple of years when Ubuntu shipped with a default timeout of 90 seconds, which is more than ten times more than what you suggest. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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