From owner-freebsd-questions@FreeBSD.ORG Mon Oct 3 19:03:14 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6031216A41F for ; Mon, 3 Oct 2005 19:03:14 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: from mail26.sea5.speakeasy.net (mail26.sea5.speakeasy.net [69.17.117.28]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0E69243D46 for ; Mon, 3 Oct 2005 19:03:13 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: (qmail 1247 invoked from network); 3 Oct 2005 19:03:13 -0000 Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org) ([66.92.78.145]) (envelope-sender ) by mail26.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 3 Oct 2005 19:03:13 -0000 Received: by be-well.ilk.org (Postfix, from userid 1147) id A6D2840; Mon, 3 Oct 2005 15:03:12 -0400 (EDT) Sender: lowell@be-well.ilk.org To: "Vahric MUHTARYAN" To: References: From: Lowell Gilbert Date: 03 Oct 2005 15:03:12 -0400 In-Reply-To: Message-ID: <44u0fyl8y7.fsf@be-well.ilk.org> Lines: 34 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Subject: Re: About SnapShot X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-questions@freebsd.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Oct 2005 19:03:14 -0000 "Vahric MUHTARYAN" writes: > Today I try to learn snapshot with FreeBSD 5.4 , perfect it's > working very fest . I wonder something if somebody have knowledge about > snapshot or have a documentation about it I will be happy. Did you read the relevant sections of "man mount"? > First I don't understand How system can take snapshot quickly I tried it on > new installed freebsd 5.4 and when I gave a command on console snapshot file > created in a second which 256MB , I wonder How fast will be on bigger > partitions. Anybody know How snapshot tecnology is working ? Because it's > creating an single file and it's 256 mb , it's not possible to copy /var > folder to another folder in a second ... Making a snapshot doesn't make copies of the files. They will only be copied if a new version is created in the real filesystem. This is called "copy on write". Technical documentation is probably at http://www.mckusick.com/softdep/ > Second Why I can't create snapshot file on different directory , I tried to > linking but it didn't work ! AS "man mksnap_ffs" says, "The snapshot_name argument must be contained within the file system mounted at mountpoint." > And anyway Does it possible to back from snapshot file to original portion > ... I mean snapshot is creating only one file When I want to backI have to > mount it to system and copy back files Im asking without copying something > and mouting snapshot file can I make a restore ? No, that isn't possible.