From owner-freebsd-current@FreeBSD.ORG Sun Jan 18 18:49:00 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E5F3216A4CE for ; Sun, 18 Jan 2004 18:49:00 -0800 (PST) Received: from smtp4.server.rpi.edu (smtp4.server.rpi.edu [128.113.2.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id AA15D43D41 for ; Sun, 18 Jan 2004 18:48:59 -0800 (PST) (envelope-from drosih@rpi.edu) Received: from [128.113.24.47] (gilead.netel.rpi.edu [128.113.24.47]) by smtp4.server.rpi.edu (8.12.8/8.12.8) with ESMTP id i0J2mut3032676; Sun, 18 Jan 2004 21:48:56 -0500 Mime-Version: 1.0 X-Sender: drosih@mail.rpi.edu Message-Id: In-Reply-To: <77605.1074377612@critter.freebsd.dk> References: <77605.1074377612@critter.freebsd.dk> Date: Sun, 18 Jan 2004 21:48:54 -0500 To: "Poul-Henning Kamp" , Randy Bush From: Garance A Drosihn Content-Type: text/plain; charset="us-ascii" ; format="flowed" X-Scanned-By: CanIt (www . canit . ca) cc: FreeBSD Current Subject: Re: rewinding a disk drive takes too long X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jan 2004 02:49:01 -0000 At 11:13 PM +0100 1/17/04, Poul-Henning Kamp wrote: >In message , Randy Bush writes: > > >>btw, what i forgot to say was >> o source system is current as of yesterday >> o dest system is stable as of today > > o until the last upgrade to the stable dest, dump would > > never complete! it always got to the same point, 86%, > > and then hung > >This is actually a pretty normal thing, dump is not very good at >predicting the size of a dump if the filesystem is live (and I >belive in a few other circumstances as well) > >Largest number I've seen recently was -250% :-) Why would dump have trouble predicting the size of a "L" filesystem? If "L" is specified (and it apparently was in this example), then wouldn't dump be working off of a static snapshot of the filesystem? -- Garance Alistair Drosehn = gad@gilead.netel.rpi.edu Senior Systems Programmer or gad@freebsd.org Rensselaer Polytechnic Institute or drosih@rpi.edu