From owner-freebsd-mobile Tue Mar 13 7:43:15 2001 Delivered-To: freebsd-mobile@freebsd.org Received: from point.osg.gov.bc.ca (point.osg.gov.bc.ca [142.32.102.44]) by hub.freebsd.org (Postfix) with ESMTP id 5E81A37B722; Tue, 13 Mar 2001 07:43:08 -0800 (PST) (envelope-from Cy.Schubert@uumail.gov.bc.ca) Received: (from daemon@localhost) by point.osg.gov.bc.ca (8.8.7/8.8.8) id HAA13599; Tue, 13 Mar 2001 07:42:52 -0800 Received: from passer.osg.gov.bc.ca(142.32.110.29) via SMTP by point.osg.gov.bc.ca, id smtpda13595; Tue Mar 13 07:42:46 2001 Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.11.2/8.9.1) id f2DFgeT04673; Tue, 13 Mar 2001 07:42:40 -0800 (PST) Received: from cwsys9.cwsent.com(10.2.2.1), claiming to be "cwsys.cwsent.com" via SMTP by passer9.cwsent.com, id smtpdUp4670; Tue Mar 13 07:41:56 2001 Received: (from uucp@localhost) by cwsys.cwsent.com (8.11.3/8.9.1) id f2DFfte07457; Tue, 13 Mar 2001 07:41:55 -0800 (PST) Message-Id: <200103131541.f2DFfte07457@cwsys.cwsent.com> Received: from localhost.cwsent.com(127.0.0.1), claiming to be "cwsys" via SMTP by localhost.cwsent.com, id smtpdBS7450; Tue Mar 13 07:41:14 2001 X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4 Reply-To: Cy Schubert - ITSD Open Systems Group From: Cy Schubert - ITSD Open Systems Group X-Sender: schubert To: Pete French Cc: bright@wintelcom.net, Helge.Oldach@de.origin-it.com, mobile@FreeBSD.ORG, oberman@es.net, sos@freebsd.dk, stable@FreeBSD.ORG Subject: Re: Disk I/O problem in 4.3-BETA In-reply-to: Your message of "Tue, 13 Mar 2001 11:51:11 GMT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 13 Mar 2001 07:41:14 -0800 Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org In message , Pete French writes: > All very interesting, but a small point has been forgotten > hasnt it ? The way I read this thread is that until recentlly > write-caching was enabled by default and has now been disabled (hence > the original obseravtion of disc performance dropping). > > I havent noticed that FreeBSD has a bad reputation for loss of data > in the event of am power outage, and my own experience backs this up. > As so many people appear to have been running it this way by default until > now you might have though that if it were a serious problem in reality then > people would have noticed by now ? Operating systems which write their metadata asynchronously are worse for data loss during power failure than FreeBSD. My experiences with FreeBSD in this area have been excellent: Much better data integrity during power failure than Linux and the commercial UNIX systems. Any loss of data that I've experienced on a FreeBSD system has either been a hardware problem or I have been the cause of the data loss. Regards, Phone: (250)387-8437 Cy Schubert Fax: (250)387-5766 Team Leader, Sun/Alpha Team Internet: Cy.Schubert@osg.gov.bc.ca Open Systems Group, ITSD, ISTA Province of BC To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message