From owner-freebsd-stable Thu Sep 6 23:32:16 2001 Delivered-To: freebsd-stable@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id DD11437B401 for ; Thu, 6 Sep 2001 23:32:10 -0700 (PDT) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id A5ECC6AD69; Fri, 7 Sep 2001 16:02:08 +0930 (CST) Date: Fri, 7 Sep 2001 16:02:08 +0930 From: Greg Lehey To: Darryl Okahata Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Vinum vs. hardware RAID (was: RAID5) Message-ID: <20010907160208.M31170@wantadilla.lemis.com> References: <20010906043421.C73353@titus.stade.co.uk> <200109061517.IAA16078@mina.soco.agilent.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200109061517.IAA16078@mina.soco.agilent.com>; from darrylo@soco.agilent.com on Thu, Sep 06, 2001 at 08:17:45AM -0700 Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF 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 Thursday, 6 September 2001 at 8:17:45 -0700, Darryl Okahata wrote: > Adrian Wontroba wrote: > >> On Wed, Sep 05, 2001 at 03:00:55PM -0700, Darryl Okahata wrote: >>> [ It's strange, considering that many "RAID users" are home users. I'm >>> constantly surprised by the number of hackers setting up "home RAID" >>> systems (using the "on-motherboard RAID controller", the Promise >>> controller, or something else like vinum or 3ware). ] >> >> Backup devices and media are expensive, wear out, and if they were big >> enough when you bought them, soon are not, leaving you with the pain of >> swapping media during backups. Tape stackers etc are expensive. >> >> If you decide that what you really want to protect yourself against is >> disk failure, RAID becomes an attractive option. > > Yes, but (as others have pointed out): > > * This only protects you against hardware disk failures (assuming RAID > 1, 5, or 10, not RAID 0). > > * If someone steals your system, you're screwed. > > * If your power supply fails catastrophically, you're screwed (unlikely, > but possible). > > * If someone compromises your system, you're screwed. > > * If your filesystem gets corrupted, you may be screwed (not likely > under normal circumstances, but power failures and enabled write > caches can cause wonderful problems). > > I'm sure others can think of other problems. My favourite one: if you do something silly and delete files you didn't mean to delete, you're screwed. This has nothing to do with Adrian's statement, of course: he specifically refers to disk failure. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message