From owner-freebsd-questions Sat Jan 5 2:10:37 2002 Delivered-To: freebsd-questions@freebsd.org Received: from dire.bris.ac.uk (dire.bris.ac.uk [137.222.10.60]) by hub.freebsd.org (Postfix) with ESMTP id 4773237B41C for ; Sat, 5 Jan 2002 02:10:35 -0800 (PST) Received: from mail.ilrt.bris.ac.uk by dire.bris.ac.uk with SMTP-PRIV with ESMTP; Sat, 5 Jan 2002 10:10:23 +0000 Received: from cmjg (helo=localhost) by mail.ilrt.bris.ac.uk with local-esmtp (Exim 3.16 #1) id 16Mnk7-0000gr-00; Sat, 05 Jan 2002 10:07:59 +0000 Date: Sat, 5 Jan 2002 10:07:59 +0000 (GMT) From: Jan Grant X-X-Sender: To: Chris Fedde Cc: Sean Ellis , ScaryG , freebsd-questions Subject: Re: Mirroring Hard Disk In-Reply-To: <200201050634.g056YMx91713@fedde.littleton.co.us> Message-ID: 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 On Fri, 4 Jan 2002, Chris Fedde wrote: > On Fri, 4 Jan 2002 22:25:38 -0800 Sean Ellis wrote: > +------------------ > | When I recently asked about cloning a hard drive I was offered a > | couple of leads for a daily mirroring of a hard drive. I'm not > | sure if mirroring the drives on a daily basis would be suitable for > | what jacks is asking about, but I'd be interested for any comment on > | using rsync or dd as means of keeping two drives relatively > | synchronized. > +------------------ > > Depending on your needs, and your availability requirements, I'd > think of using dump | restore. ...particularly for your read-mostly filesystems (/ and /usr). Sun have a cute hack for solaris where you can do "fast, safe" updates to your OS by patching the offline copy then rebooting into that; if it works, you switch your notion of main and copy - otherwise, you just reboot back into the older one. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk It's a sad fact that the word "semantics" seems to have lost all meaning. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message