From owner-freebsd-fs Tue Apr 30 10: 1:35 2002 Delivered-To: freebsd-fs@freebsd.org Received: from mail.cise.ufl.edu (beach.cise.ufl.edu [128.227.205.211]) by hub.freebsd.org (Postfix) with ESMTP id F3D5B37B41A for ; Tue, 30 Apr 2002 10:01:31 -0700 (PDT) Received: from waterspout (waterspout.cise.ufl.edu [128.227.205.52]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by mail.cise.ufl.edu (Postfix) with ESMTP id 691506C55; Tue, 30 Apr 2002 13:01:30 -0400 (EDT) Date: Tue, 30 Apr 2002 13:01:28 -0400 From: James F.Hranicky To: "Terry Lambert" Cc: bsder@allcaps.org, freebsd-fs@freebsd.org Subject: Re: Non-standard root filesystems Message-Id: <20020430130128.11428802.jfh@cise.ufl.edu> In-Reply-To: <3CCEC7D5.D22356A0@mindspring.com> References: <20020429153020.Q16532-100000@mail.allcaps.org> <3CCEC7D5.D22356A0@mindspring.com> Organization: University of Florida CISE Department X-Mailer: Sylpheed version 0.7.5 (GTK+ 1.2.8; sparc-sun-solaris2.8) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Tue, 30 Apr 2002 09:35:33 -0700 "Terry Lambert" wrote: > As far as software RAID is concerned: it's a bad idea, from a > performance perspective; I don't recommend it. Note that I'm > the person who did the original user space RAIDframe port to > FreeBSD in the mid 1990's, so I'm not just talking out my butt: > the amount of overhead for parity calculation and storage is > *considerable*, and makes RAID hardware a *much* better idea. Perhaps with RAID 5, but with 0+1 using vinum, wouldn't you see an increase with long enough plexes? Granted, it's more disks, but it may be cheaper than hardware RAID (or not, haven't looked in a while). Plus, just a simple two disk mirror for / wouldn't be all that bad, considering / shouldn't get heavy write traffic, right? ---------------------------------------------------------------------- | Jim Hranicky, Senior SysAdmin UF/CISE Department | | E314D CSE Building Phone (352) 392-1499 | | jfh@cise.ufl.edu http://www.cise.ufl.edu/~jfh | ---------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message