Date: Fri, 7 Sep 2001 16:02:08 +0930 From: Greg Lehey <grog@FreeBSD.org> To: Darryl Okahata <darrylo@soco.agilent.com> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Vinum vs. hardware RAID (was: RAID5) Message-ID: <20010907160208.M31170@wantadilla.lemis.com> In-Reply-To: <200109061517.IAA16078@mina.soco.agilent.com>; from darrylo@soco.agilent.com on Thu, Sep 06, 2001 at 08:17:45AM -0700 References: <20010906043421.C73353@titus.stade.co.uk> <200109061517.IAA16078@mina.soco.agilent.com>
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On Thursday, 6 September 2001 at 8:17:45 -0700, Darryl Okahata wrote: > Adrian Wontroba <aw1@stade.co.uk> 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
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