Date: Sat, 13 Jul 2002 16:31:30 -0400 (EDT) From: Chris BeHanna <behanna@zbzoom.net> To: FreeBSD-Stable <stable@freebsd.org> Subject: Re: Software raid 1 on root partition? Message-ID: <20020713162837.R15564-100000@topperwein.dyndns.org> In-Reply-To: <20020713100218.B284@twincat.vladsempire.net>
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On Sat, 13 Jul 2002, Josh Paetzel wrote:
> On Sat, Jul 13, 2002 at 07:51:09AM +0200, Steve O'Hara-Smith wrote:
> > On Sat, 13 Jul 2002 12:55:46 +0930
> > Greg 'groggy' Lehey <grog@FreeBSD.org> wrote:
> >
> > G> The question was about software RAID. That's currently still not
> > G> possible.
> >
> > OK now I'm confused - if you set up a RAID1 array with atacontrol
> > on a standard (non RAID) controller what's doing the RAID if it isn't the
> > ata driver software ?
> >
> > --
> > C:>WIN | Directable Mirrors
>
> That would be nothing. You can do software raid with vinum
> or some other utility, or you can do hardware ata raid with a
> promise or highpoint controller and interface to it with
> atacontrol. You can't use atacontrol to make a standard non-raid
> IDE controller do raid.
behanna@topperwein> man atacontrol
[...big snip...]
Allthough the ATA driver allows for creating an ATA RAID on disks
^^^^^^^^
on any controller, there are restrictions. It is only pos- sible
^^^^^^^^^^^^^^^^^
to boot on an array if its either located on a "real" ATA RAID
controller like the Promise or Highpoint controllers, or if the
RAID declared is of RAID1 or SPAN type, in case of a SPAN the
partition to boot must reside on the first disk in the SPAN.
--
Chris BeHanna http://www.pennasoft.com
Principal Consultant
PennaSoft Corporation
chris@pennasoft.com
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