From owner-freebsd-questions Wed Oct 27 16:38:47 1999 Delivered-To: freebsd-questions@freebsd.org Received: from malkav.snowmoon.com (machine-126-237.cdcsd.k12.ny.us [208.20.126.237]) by hub.freebsd.org (Postfix) with SMTP id 0285414D88 for ; Wed, 27 Oct 1999 16:38:39 -0700 (PDT) (envelope-from jaime@malkav.snowmoon.com) Received: (qmail 83874 invoked from network); 27 Oct 1999 23:38:34 -0000 Received: from localhost (HELO localhost.snowmoon.com) (127.0.0.1) by localhost with SMTP; 27 Oct 1999 23:38:34 -0000 Date: Wed, 27 Oct 1999 19:38:33 -0400 (EDT) From: Jaime Kikpole To: Andriss Cc: questions@freebsd.org Subject: Re: SCSI drive mirroring question In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 13 Sep 1999, Andriss wrote: > Is that the right way to do this? What I want to get is a complete > mirror copy. I need to make sure that the boot info is getting copied, > and the filesystem slices are getting copied right.. In other words, > if the first drive fails, I want to be able to simply take it out, > switch the SCSI id of the second drive, boot the box and be ready to > go... I've never used it myself, but I think that you might want to look into ccd and/or vinum. Also, if you can afford hardware based RAID systems, they're really great. I was testing one out earlier today, in fact. Just to be certain that it worked correctly, I removed drive 3 (of 4 drives) while the system was booted and I was logged on. The machine didn't even crash. It just kept running, though it did make a noise to indicate that a drive went bad. Really cheap mirroring-only RAID system tend to cost about $1200-$1400 for a two disk system. If you don't want to buy one, look at ccd or vinum. One of those might provide real-time mirroring. Jaime To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message