From: Terry Lambert <terry@lambert.org>
Message-Id: <199512032311.QAA10514@phaeton.artisoft.com>
Subject: Re: Inodes for news server
To: swaits@pr.erau.edu (Stephen Waits)
Date: Sun, 3 Dec 1995 16:11:58 -0700 (MST)
Cc: peterb@telerama.lm.com, craigs@os.com, questions@freebsd.org
In-Reply-To: <Pine.SOL.3.91.951203103852.22034B-100000@moon> from "Stephen Waits" at Dec 3, 95 10:40:35 am
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> Does FreeBSD support multiple-drive volumes??  I was under the (perhaps 
> incorrect) assumption that this 'striping' support still did not exist in 
> FreeBSD.  AIX has a nice implementation of this exact feature.  I've 
> glued together two 4.5 Gig drives into one "logical volume" upon which I 
> can create several partitions, etc..

This is one of several types of volume spanning.

AIX does this at the JFS level.  It's hard to increase the size of
a superblock in UFS without the world going to hell.  You'd need a
tool for it and there isn't one at this time.

Other types of volume spanning include:

1)	Device "concatenation" -- what the NetBSD cdd driver does;
	it could be ported to FreeBSD easily.

2)	RAID.

3)	Inferior mounts (UNIX uses this last one by default).


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.