From owner-freebsd-questions@freebsd.org Thu Aug 27 12:01:42 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0F4009C483A for ; Thu, 27 Aug 2015 12:01:42 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (smtp.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.infracaninophile.co.uk", Issuer "infracaninophile.co.uk" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id AA7981980 for ; Thu, 27 Aug 2015 12:01:41 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from zero-gravitas.local (no-reverse-dns.metronet-uk.com [85.199.232.226] (may be forged)) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.15.2/8.15.2) with ESMTPSA id t7RC1VBs083153 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Thu, 27 Aug 2015 13:01:31 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) Authentication-Results: smtp.infracaninophile.co.uk; dmarc=none header.from=infracaninophile.co.uk DKIM-Filter: OpenDKIM Filter v2.10.3 smtp.infracaninophile.co.uk t7RC1VBs083153 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infracaninophile.co.uk; s=201001-infracaninophile; t=1440676891; bh=sv+6/IxJoRLZx1Kq71m2NU9k96cjAYg68jRWmM9wR30=; h=Subject:To:References:From:Date:In-Reply-To; z=Subject:=20Re:=20Stop=20using=20a=20SATA=20drive|To:=20freebsd-qu estions@freebsd.org|References:=20=0D=0A=20<20150824214252.53aa0 4c6.freebsd@edvax.de>=0D=0A=20=0D=0A=20<55DEFA0F.9000900@sneaker tech.com>|From:=20Matthew=20Seaman=20|Date:=20Thu,=2027=20Aug=202015=2013:01:30=20+0100|In-Reply-To :=20<55DEFA0F.9000900@sneakertech.com>; b=rrFA6YYpRh+dnQgOHKA32/Gv8aEE3WplUoPtcBbNe1w54e+qQeo2sCINzky9LxM9d aNpqLGLnNNttFIqN4+Pun6fk1TGqZNn+RXwQ+1JUDzgp8apEgq+l6I2opk+bKRONqD Iwv3fMMXFbJn72wUV9UZohdpgalIRNNTWkMldjUc= X-Authentication-Warning: lucid-nonsense.infracaninophile.co.uk: Host no-reverse-dns.metronet-uk.com [85.199.232.226] (may be forged) claimed to be zero-gravitas.local Subject: Re: Stop using a SATA drive To: freebsd-questions@freebsd.org References: <20150824214252.53aa04c6.freebsd@edvax.de> <55DEFA0F.9000900@sneakertech.com> From: Matthew Seaman Message-ID: <55DEFC1A.4040806@infracaninophile.co.uk> Date: Thu, 27 Aug 2015 13:01:30 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <55DEFA0F.9000900@sneakertech.com> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="oUtlA3qOGOPP4FeL2PhEwwJ82dpa7wf9G" X-Virus-Scanned: clamav-milter 0.98.7 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-1.5 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU autolearn=ham autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on lucid-nonsense.infracaninophile.co.uk X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 27 Aug 2015 12:01:42 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --oUtlA3qOGOPP4FeL2PhEwwJ82dpa7wf9G Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 2015/08/27 12:52, Quartz wrote: > Modern drives (where "modern" means anything made in the past 10 years = I > think) are set up in such a way that the inertia of the spinning > platters will 'throw' the heads onto the parking area if power suddenly= > dies. This is not the same thing as intentionally issuing a park-head > command, but the results are more or less the same. Electric motors will act as generators: the trick with modern drives is that they use the inertia of the spinning disk platters to generate sufficient power to move the heads to the parked position when the external power goes out. Cheers, Matthew --oUtlA3qOGOPP4FeL2PhEwwJ82dpa7wf9G Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQJ8BAEBCgBmBQJV3vwbXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQxOUYxNTRFQ0JGMTEyRTUwNTQ0RTNGMzAw MDUxM0YxMEUwQTlFNEU3AAoJEABRPxDgqeTnhJUP/j/oCZhIR73sSSt9Co+x6OT9 LGDxhxt9Tywx3VG9dzsV7+cupTbEXhUkct2Gy/XWBpMm6vpgsTWsPKouia4Bq+6U lVExIPuU5f35pGIN/Mf/TqkU1VP6eF2Jr99L+BV1dZ/jBTwwxg2hgLSPwymzla0J ye+ddbAV9HA+tNDnrlCYrjzLUWwp5rVPajzk5vMT4g1ITvs9YQd3jyK1wH0JEFTH xWOiV5jiGqHUdKjrSaseVoRg63oL85LBNFy2H+wbR/GSB5VvB8Ti7DfSHopEjvF3 0g8VaO3QiXfuil11G8zoVRcFpOkk+MGnZROSL1mT1OHT7Wvy7JuO1peXI+EWvdM5 eOuLXe6opDCb+GuurSQ8lUa7V8HGTmdS1ZVQTFQC/jBRm5h9FmB8CFPZl8T3YNCD Or7jRyum3lOwdS1KfxUXY61obMTPaXSvdvJRtV2iClNKy+E6nTHp/SRrslbumIaw XKRl9X2EJ0Pa6ngWXHrAywtqykaoCKzA6siZ+dYSkcOX9LXwijyphX8gQaok7WAm mwPC7FHxbO/pjq1akYx4FUgCU7CDKNQvDLFD11xOOVtOz6xoGFfRsbakTo6Rv9wy wrnY9agoMsZ2o3yQH4fgCxPDbgzQhCqcVMLvnVkB5+6dom9HjBMf8KHioHs46c4u GPBD+ingMJqrpTZFUwLj =ckdo -----END PGP SIGNATURE----- --oUtlA3qOGOPP4FeL2PhEwwJ82dpa7wf9G--