From owner-freebsd-questions Thu Aug 31 8: 2:48 2000 Delivered-To: freebsd-questions@freebsd.org Received: from djl01.djl.co.uk (djl01.djl.co.uk [195.58.135.195]) by hub.freebsd.org (Postfix) with ESMTP id 2859E37B42C for ; Thu, 31 Aug 2000 08:02:42 -0700 (PDT) Received: from DJL.co.uk (djl02.djl.co.uk [195.58.135.196]) by djl01.djl.co.uk (8.9.2/8.9.2) with ESMTP id QAA05011; Thu, 31 Aug 2000 16:02:39 +0100 (BST) Message-ID: <39AE72A9.345E0B3F@DJL.co.uk> Date: Thu, 31 Aug 2000 15:58:49 +0100 From: David Larkin Organization: DJL Software Consultancy Ltd X-Mailer: Mozilla 4.5 [en] (X11; I; FreeBSD 2.2.5-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: questions@FreeBSD.org Subject: Disk Backup (Mirroring ?) Content-Type: multipart/alternative; boundary="------------D6C4C8921BC30566BDDF8ADA" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG --------------D6C4C8921BC30566BDDF8ADA Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hi, I've recently installed 4.0. The machine has 2 identical disks ad0: 9768MB [19846/16/63] at ata0-master using UDMA33 ad1: 9768MB [19846/16/63] at ata0-slave using UDMA33 I've installed FreeBSD on ad0, and ad1 is a virgin disk. I want to periodically back up ad0 to ad1 so that if ad0 goes pop, I simply swap them around, reboot, and I'm up and running again, even if it is a week or two out of date. I'm pretty sure I saw a way of doing this on the mailing list a while ago, that was why I bought the 2 identical disks. I can't find this solution now. I keep finding references to vinum, which I'm not sure I really need. I'm looking for a solution involving dd , raw devices, pipes or redirects , and maybe single user mode. Any ideas ? Thanks Dave --------------D6C4C8921BC30566BDDF8ADA Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit 
Hi,
I've recently installed 4.0.
The machine has 2 identical disks
ad0: 9768MB <ST310212A> [19846/16/63] at ata0-master using UDMA33
ad1: 9768MB <ST310212A> [19846/16/63] at ata0-slave using UDMA33
I've installed FreeBSD on ad0, and ad1 is a virgin disk.

I want to periodically back up ad0 to ad1 so that if ad0 goes pop,
I simply swap them around, reboot, and I'm up and running again,
even if it is a week or two out of date.

I'm pretty sure I saw a way of doing this on the mailing list a while
ago, that was why I bought the 2 identical disks.

I can't find this solution now. I keep finding references to vinum, which
I'm not sure I really need.

I'm looking for a solution  involving  dd , raw devices, pipes or redirects ,
and maybe single user mode.

Any ideas ?

Thanks
Dave
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