From owner-freebsd-stable Thu Jul 11 23:35:56 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EDE9337B400 for ; Thu, 11 Jul 2002 23:35:53 -0700 (PDT) Received: from mail.allcaps.org (h-66-166-142-198.SNDACAGL.covad.net [66.166.142.198]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7EE9143E67 for ; Thu, 11 Jul 2002 23:35:53 -0700 (PDT) (envelope-from bsder@mail.allcaps.org) Received: by mail.allcaps.org (Postfix, from userid 501) id 90817153B7; Thu, 11 Jul 2002 23:35:51 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.allcaps.org (Postfix) with ESMTP id 8492A15277; Thu, 11 Jul 2002 23:35:51 -0700 (PDT) Date: Thu, 11 Jul 2002 23:35:51 -0700 (PDT) From: "Andrew P. Lentvorski" To: Gerhard Sittig Cc: freebsd-stable@freebsd.org Subject: Re: Software raid 1 on root partition? In-Reply-To: <20020711232331.U1494@shell.gsinet.sittig.org> Message-ID: <20020711230521.E73169-100000@mail.allcaps.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, 11 Jul 2002, Gerhard Sittig wrote: > And in all the thread's length I still question the benefit of > running your root fs in software RAID. Since /tmp and /var and > /usr (and /home) usually all are separate partitions of their > own I don't see how the root fs could be often modified or > heavily stressed. Ummmm, I might want to do that so that the failure of the *single* disk which holds the root filesystem doesn't take out my entire system? The poster asked about RAID 1 which is mirroring only. He didn't care so much about performance, but he did want reliability. In a truly hot-swappable RAID 1 configuration, the system should *never* have to reboot after its initial startup due to a drive failure. Simply shut down the offending disk, swap it out, restart the new disk and rebuild the RAID 1 mirror. No system downtime required. If the drive fails during a reboot for system maintenance, manual intervention (pointing at the other drive, swapping the drives around, etc) is not an unreasonable expectation to get the system restarted. Then you replace the defective drive and rebuild the mirror. -a To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message