Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 14 Sep 2002 09:31:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 14 Sep 2002 09:31:12 -0400 Received: from pc1-cwma1-5-cust128.swa.cable.ntl.com ([80.5.120.128]:7666 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Sat, 14 Sep 2002 09:31:11 -0400 Subject: Re: Possible bug and question about ide_notify_reboot in drivers/ide/ide.c (2.4.19) From: Alan Cox To: Matthias Andree Cc: linux-kernel@vger.kernel.org In-Reply-To: <20020914095356.GA28271@merlin.emma.line.org> References: <20020914010101.75725.qmail@web40502.mail.yahoo.com> <20020914095356.GA28271@merlin.emma.line.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.8 (1.0.8-7) Date: 14 Sep 2002 14:37:35 +0100 Message-Id: <1032010655.12892.8.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1149 Lines: 26 On Sat, 2002-09-14 at 10:53, Matthias Andree wrote: > How about this: The FLUSH CACHE command has only recently become a > mandatory command for non-PACKET devices, so there may be drives that do > implement a write cache, but do NOT implement the FLUSH CACHE -- and > still adhere to some older edition of the ATA standard. Worse than that. There are drives that did implement it - as a no-op. They didn't even say "Umm sorry no can do" > See above. Disable Write Cache would also do with recent drives. Except some drives have a habit of turning it back on quietly > If I recall correctly, Windows' shutdown procedure was at some time in > the past changed to wait a couple of seconds before switching the ATX > computers off, to allow the drives to flush their caches. I can't quote > on a KB article though. Flush on shutdown was apparently one of the windows 98 service pack/hot fix additions. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/