Date: Thu, 21 Oct 2010 13:57:56 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Alexander Best <arundel@freebsd.org> Cc: freebsd-hackers@freebsd.org, mav@freebsd.org, Tijl Coosemans <tijl@coosemans.org>, Oliver Fromme <olli@lurza.secnetix.de> Subject: Re: Summary: Re: Spin down HDD after disk sync or before power off Message-ID: <868w1r92rf.fsf@ds4.des.no> In-Reply-To: <20101018155944.GA12425@freebsd.org> (Alexander Best's message of "Mon, 18 Oct 2010 15:59:44 %2B0000") References: <201009161742.24228.tijl@coosemans.org> <201009161619.o8GGJAmv035378@lurza.secnetix.de> <20101018155944.GA12425@freebsd.org>
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Alexander Best <arundel@freebsd.org> writes: > since there seems no way to distinguish between these two states in ATA(4= ) it's > probably better to leave it as it is, since doing spin downs upon reboot = might > be even worse than not doing spindowns upon shutdown. No. Where did you get that idea? To repeat what I've said before - several times - in this thread, a modern disk drive can handle hundreds of thousands of controlled unloads but only a few hundred emergency unloads. Given the choice between "never spin down" and "always spin down", the safe alternative is "always spin down". DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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