Date: Wed, 22 Nov 2006 16:05:00 +0100 From: Christian Brueffer <brueffer@FreeBSD.org> To: Paul Chvostek <paul+fbsd@it.ca> Cc: freebsd-geom@freebsd.org Subject: Re: geom_fox and isp ... or something else? Message-ID: <20061122150459.GB2043@haakonia.hitnet.RWTH-Aachen.DE> In-Reply-To: <20061122061606.GA56653@it.ca> References: <20061122061606.GA56653@it.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
--lEGEL1/lMxI0MVQ2
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
On Wed, Nov 22, 2006 at 01:16:07AM -0500, Paul Chvostek wrote:
> Hiya.
>=20
> ${DAYJOB} has a long history with Novell. In the epic battle I wage for
> acceptance of FreeBSD alongside SLES, multipathing has come up.
>=20
> We have a nifty new SAN. We have multipathing-capable drivers for
> Windows. We have instructions from Novell on how to set up multipathing
> in SLES (though some list traffic that suggests that Qlogic behaviour is
> less than stellar).
>=20
> I've been able to wheedle a pair of Qlogic cards (purchased because
> corporate standards are more important than verifying a product's
> usefulness) connected to a box for testing. The SAN is insanely fast,
> but of course multipathing doesn't work.
>=20
> I've seen Pawel's GEOM_ROME tease from early 2004. While I'd love to
> have a "full, finished multipathing implementation", I'd also happily
> stick with geom_fox with whatever hardware combination or custom hacks
> are required, if I could just get it to pass a link failure test.
>=20
> I'm seeing the same behaviour as has been noted -- if the link goes
> down, isp doesn't notice, so no failover happens. When the link is
> down, the system grinds to a halt waiting for the disk to be available.
>=20
> I've found old freebsd-geom posts (Poul, Pawel, Andrew) that mention isp
> driver problems and potential patches, but if somebody's written a fix,
> I can't find it. Does it exist?
>=20
> If Qlogic adapters are a no-go (because I can neither write nor fund the
> required fix), has someone gotten FC multipathing to work with Adaptec
> or LSI adapters?
>=20
> *Is* there a way to get fibre-channel multipathing working, so this
> expensive SAN can be used with an OS more robust than Windows?
>=20
> - 6.1-RELEASE
> - isp0, isp1
> - ispfw
> - /dev/da1 through /dev/da8 (paths)
> - geom_fox gives me /dev/da8.fox
>=20
> I am in a position to test things.
>=20
Matt Jacob (mjacob@) is working on multipath/failover support for
isp(4). You should check out the isp(4) driver in CURRENT and his
perforce branch, //depot/projects/newisp .
- 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
--lEGEL1/lMxI0MVQ2
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (FreeBSD)
iD8DBQFFZGcbbHYXjKDtmC0RAsJmAKDQnwkvySYneidP5V19vP/TCipMzgCeI3d6
qJa70Vbsk1w10rXWUJD9TAk=
=i/sl
-----END PGP SIGNATURE-----
--lEGEL1/lMxI0MVQ2--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20061122150459.GB2043>