[7457] in linux-scsi channel archive
RE: Please Help - SCSI RAID device very slow
daemon@ATHENA.MIT.EDU (Matthew Clark)
Thu Oct 28 16:26:39 1999
Reply-To: <m.r.clark@btinternet.com>
From: "Matthew Clark" <m.r.clark@btinternet.com>
To: <bluca@comedia.it>, "Alan Cox" <alan@lxorguk.ukuu.org.uk>
Cc: <linux-scsi@vger.rutgers.edu>, <linux-raid@vger.rutgers.edu>
Date: Thu, 28 Oct 1999 21:18:31 +0100
Message-ID: <004b01bf2181$9a3e3890$0100a8c0@netdespatch.co.uk>
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In-reply-to: <19991028163054.D11879@colombina.comedia.it>
With the LH4, you can infact disable the AMI Megaraid and access the Symbios
directly.. however - we want to use the RAID...
I've had enough of all this guessing though - I'm going to take it to bits
and find our what's not working (gunna install NT on it and see if we still
get bad performance too)
> -----Original Message-----
> From: owner-linux-raid@vger.rutgers.edu
> [mailto:owner-linux-raid@vger.rutgers.edu]On Behalf Of Luca Berra
> Sent: 28 October 1999 15:31
> To: Alan Cox
> Cc: m.r.clark@btinternet.com; linux-scsi@vger.rutgers.edu;
> linux-raid@vger.rutgers.edu
> Subject: Re: Please Help - SCSI RAID device very slow
>
>
> On Thu, Oct 28, 1999 at 12:15:19AM +0100, Alan Cox wrote:
> > > Does anyone know how I stop the MegaRAID using the onboard INTEL SCSI
> > > Controller? (i960) It should be using my SYMBIOS card...???
> >
> > An i960 isnt a scsi controller. If you want to use the symbios
> directly load
> > the ncr53c8xx driver and not the symbios driver. I'not totally
> sure if that
> > will work but it is at least the right driver. That will
> basically cut out
> > use of the megaraid totally
>
> no way!
> the megaraid controller hides completely the symbios onboard chip
> so linux does not see it at all.
> I know of one case where it is possible to bypass the megaraid
> for at lease one channel, it is the embedded netraid(remarketed megaraid)
> on hp netservers LH3, you have to change a setting in the bios.
> All other cards i tested (netraid 1, netraid3, netraid3si)
> don't allow this option.
>
> Regards,
> Luca
>
> --
> Luca Berra -- bluca@comedia.it
> Communications Media & Services S.r.l.
>
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