From owner-freebsd-questions@FreeBSD.ORG Tue Oct 15 12:22:32 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 81342C08 for ; Tue, 15 Oct 2013 12:22:32 +0000 (UTC) (envelope-from tomek.cedro@gmail.com) Received: from mail-qc0-x22f.google.com (mail-qc0-x22f.google.com [IPv6:2607:f8b0:400d:c01::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 3F5802D40 for ; Tue, 15 Oct 2013 12:22:32 +0000 (UTC) Received: by mail-qc0-f175.google.com with SMTP id v2so5824777qcr.34 for ; Tue, 15 Oct 2013 05:22:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=sdrisckRwKKyvrz/Carsn551tQi2w5wMQ4wyESBpRsY=; b=QoHm0sJWWA4Cy3Exh4wz1QF2RO1ylykBUhKLB8KHoJ38j5kciTePJ6P5W8zab8W2V5 whrnnIERoCQj+S+zgDhDwei9rvbwWlVNzI6eABMlKOn3HwiSdt/vwfe4PWOz2m+Ownvu ZMOz/MvOyfTQUX4CAQ5wkysb7mB0pxD2B/qwV3+mohgAT7yerFZTDaMG8Sus3+RlsiKl BdzA+CVDCIVCP1KUsCWq2SnnbdvkVJwmOo1nuJON7wp4MDFrYBzZzsyiyKnAfELlk5SX NYvkr1djiHqT9iSOhMkXjfoPN3qn4uoYIUAt0uyFXu2F7obFCXCPkxigNE6rR8Ch5A20 fNng== MIME-Version: 1.0 X-Received: by 10.49.26.6 with SMTP id h6mr10730419qeg.75.1381839751369; Tue, 15 Oct 2013 05:22:31 -0700 (PDT) Sender: tomek.cedro@gmail.com Received: by 10.49.16.170 with HTTP; Tue, 15 Oct 2013 05:22:31 -0700 (PDT) In-Reply-To: References: <525A6831.5070402@gmail.com> <20131014133953.58f74659@gumby.homeunix.com> <525C1D1C.9050708@gmail.com> <525C2554.7080203@pchotshots.com> <525C2FBC.4080808@cran.org.uk> <2351E8C5-4FC0-4AE9-AC21-312DA46C0EE8@mac.com> <20131015073048.83d7bca4.freebsd@edvax.de> Date: Tue, 15 Oct 2013 14:22:31 +0200 X-Google-Sender-Auth: pCvlh945La5W4mAOq0nZ_HGHbVM Message-ID: Subject: Re: SU+J Lost files after a power failure From: CeDeROM To: Daniel Feenberg Content-Type: text/plain; charset=UTF-8 Cc: Polytropon , FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Oct 2013 12:22:32 -0000 On Tue, Oct 15, 2013 at 1:47 PM, Daniel Feenberg wrote: > We have a disk-to-disk backup that runs continuously. I have found that if I > unmount the backup disk and remove it without delay, then sometimes it > requires an fsck to remount. So I believe that umount does not wait for all > writes to complete. This can be observed on USB Mass Storage devices that blink activity some time even after umount completes...? :-) -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info