Date: Wed, 18 Mar 2009 12:21:09 +0000 (GMT) From: "Mark Powell" <M.S.Powell@salford.ac.uk> To: Garrett Cooper <yanefbsd@gmail.com> Cc: "army.of.root" <army.of.root@googlemail.com>, freebsd-current@freebsd.org, Andriy Gapon <avg@icyb.net.ua> Subject: Re: ata: printf on every spinup/spindown? Message-ID: <20090318121809.N11502@rust.salford.ac.uk> In-Reply-To: <7d6fde3d0903170528g656e9edfn4fe5afc013c42999@mail.gmail.com> References: <49BE7C5A.2080103@icyb.net.ua> <49BEB449.9090302@googlemail.com> <7d6fde3d0903170528g656e9edfn4fe5afc013c42999@mail.gmail.com>
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On Tue, 17 Mar 2009, Garrett Cooper wrote: > Spinning down to a lower RPM seems legitimate, compared to spinning it > down, which kills the drives. AFAIK there are no drives which have multiple spin speeds. That's too complex. > Look at WD's green drives -- they claim to get 30% ~ 50% better power > efficiency than standard drives. Though WD may like to make it appear their GP drives, vary between 5400 and 7200, all current models spin at a fixed 5400rpm. Looked at closely, their claims only suggest that they may in future release GP drives which spin at 7200rpm, but in truth they won't. Cheers. -- Mark Powell - UNIX System Administrator - The University of Salford Information & Learning Services, Clifford Whitworth Building, Salford University, Manchester, M5 4WT, UK. Tel: +44 161 295 6843 Fax: +44 161 295 5888 www.pgp.com for PGP key
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