From owner-freebsd-stable Sat Sep 22 18:38:47 2001 Delivered-To: freebsd-stable@freebsd.org Received: from leviathan.inethouston.net (leviathan.inethouston.net [66.64.12.249]) by hub.freebsd.org (Postfix) with ESMTP id 2674437B426 for ; Sat, 22 Sep 2001 18:38:44 -0700 (PDT) Received: from dwcjr (unknown [66.64.12.254]) by leviathan.inethouston.net (Postfix) with ESMTP id 6371210F42B; Sat, 22 Sep 2001 20:38:44 -0500 (CDT) Message-ID: <002501c143d0$78fa1b40$fe0c4042@inethouston.net> From: "David W. Chapman Jr." To: "Chad R. Larson" , "Daniel O'Connor" Cc: "j mckitrick" , , "Nuno Teixeira" References: <20010921035414.B75668@dogma.freebsd-uk.eu.org> <20010922182052.B16388@freeway.dcfinc.com> Subject: Re: hw.ata.wc && hw.ata.tags && softupdates short question Date: Sat, 22 Sep 2001 20:38:39 -0500 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG As pointed out, its believed that IBM uses capacitors to fix this problem. > Years ago, there was a main-frame drive manufacturer who used the > spindle motor as a generator in the case of a power failure. The > kinetic energy in the spinning disk pack was converted to electricity, > so there would be enough energy to flush the cache to disk and then park > the heads. I think it was Century. You know, those drives that looked > like small washing machines and had removable disk packs? > > I wonder if any of the current PC drive manufacturers do (or have > considered doing) the same thing? > > -crl > -- > Chad R. Larson (CRL15) 602-953-1392 Brother, can you paradigm? > chad@dcfinc.com chad@larsons.org larson1@home.com > DCF, Inc. - 14623 North 49th Place, Scottsdale, Arizona 85254-2207 > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message