Date: Thu, 5 Mar 2009 08:58:50 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-hackers@FreeBSD.ORG Subject: Re: Spin down HDD after disk sync or before power off Message-ID: <200903050758.n257wod8088426@lurza.secnetix.de> In-Reply-To: <20090304195614.GA179@britannica.bec.de>
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Joerg Sonnenberger wrote: > Oliver Fromme wrote: > > Octavian Covalschi wrote: > > > I'm looking a way to spin down HDD just right before power off. Why? > > > > > > Because currently when I call "shutdown -p now", HDD is powered off at it's > > > full speed (7200.4) and as a result > > > I hear a noise of stopping/spinning down of HDD, and _this_ concerns me as > > > I'm afraid it can damage HDD. > > > > You don't have to spin down a disk before powering it off. > > The noise you hear is probably caused by the "autopark" > > feature of the drive. It is harmless. > > This is not true. Many hard disks don't like having to do an emergency > shutdown as it affects the disk life time negatively. That's what > happens if you poweroff the machine when the disks are still spinning. Can you point to any authoritative information (URL) about that claim, such as vendor specs, white paper or similar? Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd I suggested holding a "Python Object Oriented Programming Seminar", but the acronym was unpopular. -- Joseph Strout
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