From owner-freebsd-questions Mon Nov 18 6:49: 6 2002 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 62C1D37B401 for ; Mon, 18 Nov 2002 06:49:04 -0800 (PST) Received: from sage-one.net (adsl-65-71-135-137.dsl.crchtx.swbell.net [65.71.135.137]) by mx1.FreeBSD.org (Postfix) with ESMTP id 10EDF43E8A for ; Mon, 18 Nov 2002 06:49:03 -0800 (PST) (envelope-from jackstone@sage-one.net) Received: from sagea (sagea [192.168.0.3]) by sage-one.net (8.11.6/8.11.6) with SMTP id gAIEmsD02569; Mon, 18 Nov 2002 08:48:54 -0600 (CST) (envelope-from jackstone@sage-one.net) Message-Id: <3.0.5.32.20021118084849.01159fc8@mail.sage-one.net> X-Sender: jackstone@mail.sage-one.net X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.5 (32) Date: Mon, 18 Nov 2002 08:48:49 -0600 To: Jan Grant From: "Jack L. Stone" Subject: Re: restore question Cc: Mark , freebsd-questions In-Reply-To: <3.0.5.32.20021118082557.01159fc8@mail.sage-one.net> References: <3.0.5.32.20021115091500.010abd98@mail.sage-one.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 08:25 AM 11.18.2002 -0600, Jack L. Stone wrote: >At 01:04 PM 11.16.2002 +0000, Jan Grant wrote: >>On Fri, 15 Nov 2002, Jack L. Stone wrote: >> >>> I missed this earlier. You say: >>> >>> "That is why the only clean way of doing this, would be to make a >>> disk-image, like Ghost does." >>> >>> I'm unaware of any backup that takes longer than a nanosecond where files >>> will not have changed on a system by the time you are done making an image. >>> Does Ghost sync the files again at the end of the backup....??? I am not >>> anti-Ghost, just pro-dump/retore and dd after that and tar after that...... >>> because I feel I can trust them with my data. >> >>Dump is NOT guaranteed to work taking an image of a live filesystem. If >>you want this behaviour, you're better off creating a filesystem >>snapshot and using your favourite backup mechanism on that. There are no >>plans that I'm aware of to move the FS snapshotting code into 4-STABLE. >> >>jan >>-- > >Your comments take the thread out of context and moves far from the >original post. I never have said that ANY backup of a live filesystem >should be considered safe from corruption. See the word "nanosecond". > >However, to resond, if one has the luxuary of dropping down to single user >(to reduce file changes and possible file corruption) and then doing a >dump, the integrity of the backup should be reliable. Dump is the only >backup program recommended by the Handbook as being safe and has stood the >test of time. I cannot have the server down on a frequent basis, so I do >dumps daily on live systems. Have used them on occasion to restore and so >far, every one has worked fine.....including being bootable. > >Now, the original question was about the existance of a "Ghost-like" >program to duplicate one HD to another. My observation was that dd(1) is >the closest thing I know about and it's in the base system. BTW, I've also >used dd(1) in a pinch and every case has worked fine there too.... booted >right up and never any indication of a problem. > "....Dump is the only backup program recommended by the Handbook as being safe..." Pardon me. That should have been "....as being safe to move whole filesystems....." Not a condemnation of other programs. Best regards, Jack L. Stone, Administrator SageOne Net http://www.sage-one.net jackstone@sage-one.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message