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Date:      Thu, 02 Mar 2006 16:16:31 +0100
From:      Christian Brueffer <chris@unixpages.org>
To:        Doug Ambrisko <ambrisko@ambrisko.com>
Cc:        Cristiano Deana <cristiano.deana@gmail.com>, freebsd-stable@freebsd.org
Subject:   Re: New 'amr' driver and linux MegaMGR
Message-ID:  <20060302151631.GC1464@haakonia.hitnet.RWTH-Aachen.DE>
In-Reply-To: <200603021505.k22F57iI098940@ambrisko.com>
References:  <E1FEidA-000OXz-H9@cs1.cs.huji.ac.il> <200603021505.k22F57iI098940@ambrisko.com>

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On Thu, Mar 02, 2006 at 07:05:07AM -0800, Doug Ambrisko wrote:
> Danny Braniss writes:
> | > Cristiano Deana writes:
> | > | 2006/3/1, Paul Saab <ps@freebsd.org>:
> | > | > works fine
> | > |=20
> | > | I got:
> | > |  Failed to open driver node /dev/megadev0
> | >=20
> | > Make sure you have amr_linux.  kldload amr_linux.ko.  Then you should
> | > get a /dev/megadev0.  It also works in a static kernel.  You might
> | > want to do an ls -l of /dev/megadev0.  This is only available
> | > in FreeBSD 6.1 and -current it is not in FreeBSD 6.0.  The changes
> | > will drop into FreeBSD 6.0 though.
> |=20
> | i'm getting:
> |=20
> | Copyright (c) 1992-2006 The FreeBSD Project.
> | Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
> |         The Regents of the University of California. All rights reserve=
d.
> | FreeBSD 6.1-PRERELEASE #3: Mon Feb 27 10:23:29 IST 2006
> | ...
> | module_register_init: MOD_LOAD (amr_linux, 0xffffffff805f1b00, 0) error=
 6
> | ad4: 286168MB <WDC WD3000JD-00KLB0 08.05J08> at ata2-master SATA150
> | ad6: 286168MB <WDC WD3000JD-00KLB0 08.05J08> at ata3-master SATA150
> | ar0: 572072MB <LSILogic v3 MegaRAID RAID0 (stripe 16 KB)> status: READY
> | ar0: disk0 READY using ad4 at ata2-master
> | ar0: disk1 READY using ad6 at ata3-master
> |=20
> | and no /dev/megadev0
> |=20
> | maybe because:
> | atapci1@pci0:31:2:      class=3D0x01048f card=3D0x34518086 chip=3D0x25b=
08086 rev=3D0x02 hdr=3D0x00
> |     vendor   =3D 'Intel Corporation'
> |     device   =3D '6300ESB Serial ATA Controller (RAID mode)'
> |     class    =3D mass storage
> |     subclass =3D RAID
>=20
> You don't have an LSI RAID controller.  Those are the built in Intel
> SATA ports in RAID mode which is software RAID.  It is being detected
> as ata disks and using ata-raid.  So you can't use the LSI RAID tools.
> If it was detected via the amr(4) driver then you could use the LSI RAID
> tools.
>=20
> Now it is using the LSI RAID meta-data.  "atacontrol" will manage this
> assuming Soren has the meta-data write support for their format.
>=20

For the LSI metadata formats, there is only read support.  See ataraid(4)
for details.

- Christian

--=20
Christian Brueffer	chris@unixpages.org	brueffer@FreeBSD.org
GPG Key:	 http://people.freebsd.org/~brueffer/brueffer.key.asc
GPG Fingerprint: A5C8 2099 19FF AACA F41B  B29B 6C76 178C A0ED 982D

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