From owner-freebsd-questions  Fri Oct 18 06:45:28 1996
Return-Path: owner-questions
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.5/8.7.3) id GAA22823
          for questions-outgoing; Fri, 18 Oct 1996 06:45:28 -0700 (PDT)
Received: from brimstone.gage.com (brimstone.gage.com [205.217.2.10])
          by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id GAA22801;
          Fri, 18 Oct 1996 06:45:23 -0700 (PDT)
Received: (from mail@localhost) by brimstone.gage.com (8.7.5/8.7.3) id IAA11577; Fri, 18 Oct 1996 08:44:41 -0500 (CDT)
Received: from octopus.gage.com(158.60.57.50) by brimstone.gage.com via smap (V2.0beta)
	id xma011575; Fri, 18 Oct 96 08:44:15 -0500
Received: from squid.gage.com (squid [158.60.57.101]) by octopus.gage.com (8.7.5/8.7.3) with SMTP id IAA08237; Fri, 18 Oct 1996 08:38:18 -0500 (CDT)
Received: from insomnia by squid.gage.com (NX5.67e/NX3.0S)
	id AA28374; Fri, 18 Oct 96 08:45:01 -0500
Message-Id: <9610181345.AA28374@squid.gage.com>
Received: by insomnia.gage.com (NX5.67g/NX3.0X)
	id AA01413; Fri, 18 Oct 96 08:45:09 -0500
Content-Type: text/plain
Mime-Version: 1.0 (NeXT Mail 4.0 v146.2)
In-Reply-To: <199610180032.SAA04608@glacier.cold.org>
X-Nextstep-Mailer: Mail 3.3 (Enhance 1.3)
Received: by NeXT.Mailer (1.146.2)
From: Ben Black <black@gage.com>
Date: Fri, 18 Oct 96 08:45:08 -0500
To: Brandon Gillespie <brandon@glacier.cold.org>
Subject: Re: ccd setup for striping 
Cc: Michael Beckmann <petzi@zit.th-darmstadt.de>, fs@freebsd.org,
        questions@freebsd.org
References: <199610180032.SAA04608@glacier.cold.org>
Sender: owner-questions@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

>They really are not relative, the idea behind doing a RAID drive is to get
>stability from redundancy (not more disk space)--if one drive cooks you
>still have 5 (or however many) other drives still functional.  Using
>multiple disks with different partitions would give you more disk space,
>but would not give you any more stability.

i'll assume by stability you mean fault-tolerance.  honestly, this is a news  
server we are talking about...is the news *that* important?  i promise you  
using software RAID will *kill* the server performance.

also, the idea behind RAID is to use multiple disks to various ends: some  
RAID levels do *not* give you data redundancy (striping without parity is  
very fast, but not fault-tolerant, for instance), some make poor use of disk  
space to avoid losing performance doing parity calculations (mirroring)...you  
get the idea.


b3n