*BSD News Article 67934


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From: fitz@think.com (Tom Fitzgerald)
Newsgroups: comp.unix.bsd.bsdi.misc
Subject: Re: Can BSDI 2.0 handle 9GB SCSI Drives?
Date: 07 May 1996 23:34:12 GMT
Organization: Thinking Machines Corporation
Lines: 23
Message-ID: <FITZ.96May7193412@rog.think.com>
References: <4mevk2$a2o@news.hal-pc.org> <4mmkdg$jsb@strange.dfwmm.net>
	<Dr0vu0.3pC@ritz.mordor.com> <318FBD8B.4105CE4F@lambert.org>
NNTP-Posting-Host: rog.think.com

Terry Lambert <terry@lambert.org> sez:

> Technically, it's a volume spanning driver which supports
> mirroring.  It has also been used (by Rod Grimes) with
> spindle sync to support true striping.
> 
> Without parity, ECC, or hamming codes, it's not real RAID.

To get a little more informal about it, this comes from the "RAID Guide" at
http://www.invincible.com/rguide.htm.

# RAID 0: Striping
# 
#  RAID level 0 refers to striping data across multiple disks without any
#  redundant information. RAID level 0 was not defined by the Berkeley
#  engineers but has become a commonly used term. 
#

So you're both half right.

-- 
Tom Fitzgerald   Thinking Machines Corp, Bedford MA, USA   A3FC3545C031E735
fitz@think.com   (617)276-0400 x4848                       3DE72FB31F6028D1