From owner-freebsd-bugs Sun Mar 24 15:49: 2 2002 Delivered-To: freebsd-bugs@freebsd.org Received: from scaup.prod.itd.earthlink.net (scaup.mail.pas.earthlink.net [207.217.120.49]) by hub.freebsd.org (Postfix) with ESMTP id 1C50C37B404; Sun, 24 Mar 2002 15:48:57 -0800 (PST) Received: from pool0344.cvx40-bradley.dialup.earthlink.net ([216.244.43.89] helo=mindspring.com) by scaup.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16pHjH-0003hn-00; Sun, 24 Mar 2002 15:48:51 -0800 Message-ID: <3C9E65CE.5278B5C6@mindspring.com> Date: Sun, 24 Mar 2002 15:48:30 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Robert Watson Cc: Willie Viljoen , freebsd-fs@freebsd.org, freebsd-bugs@freebsd.org Subject: Re: Soft update instability with heavy IO and offboard IDE controller References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Robert Watson wrote: > > The drive lies about commiting data to stable storage. This blows away > > all the hard work soft updates does trying to ensure ordering. > > Yes, but that failure is only exposed to the operating system if the drive > fails to actually write the data, which to my understanding, occurs only > when there is a power loss to the drive. It depends on when the lie is perpetrated by the hardware. > I have to say that my answer on the ATA write caching is a UPS. :-) 8-). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message