linux-kernel - Re: Problem with legacy megaraid

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Message-Id: <20060930230259.497b7bc9.akpm@osdl.org>
Date:	Sat, 30 Sep 2006 23:02:59 -0700
From:	Andrew Morton <akpm@...l.org>
To:	"Chris Lee" <labmonkey42@...il.com>
Cc:	<linux-kernel@...r.kernel.org>,
	"'Ju, Seokmann'" <Seokmann.Ju@...l.com>,
	<linux-scsi@...r.kernel.org>, <Neela.Kolli@...enio.com>
Subject: Re: Problem with legacy megaraid

On Sun, 1 Oct 2006 00:39:37 -0500
"Chris Lee" <labmonkey42@...il.com> wrote:

> Thanks for your response Andrew.  Comment responses in-line:
> 
> > 
> > > I am not subscribed to this list.  Please CC me on replies.
> > 
> > (more cc's added)
> > 
> 
> Outstanding; thank you.
> 
> > > I have a machine I'm trying to use as a file server.  I 
> > have a RAID10 and a
> > > RAID5 on a single Dell PERC2/DC (AMI Megaraid 467) 
> > controller.  Both arrays
> > > are also on the same SCSI channel.  The system runs fine 
> > for days on end
> > > until I put some heavy I/O load on either array and sustain 
> > it for a few
> > > seconds.
> > 
> > We recently discovered that "The old megaraid driver is 
> > apparently borken
> > for firmware newer than 6.61.".  So please check that and see if a
> > downgrade is needed.
> > 
> 
> The Dell firmware version on the card currently is 1.06.  I have not found a
> newer firmware version than that one.
> 
> > Is there some reason why you cannot use the new megaraid driver?
> > 
> 
> The config help for the megaraid drivers suggested that the new megaraid
> driver would not support a PERC2.  I had enabled both drivers in the kernel
> which is having this problem.:
> 
> CONFIG_MEGARAID_NEWGEN=y
> CONFIG_MEGARAID_MM=y
> CONFIG_MEGARAID_MAILBOX=y
> CONFIG_MEGARAID_LEGACY=y
> 
> After your suggestion I rebuilt the kernel with legacy disabled.:
> 
> CONFIG_MEGARAID_NEWGEN=y
> CONFIG_MEGARAID_MM=y
> CONFIG_MEGARAID_MAILBOX=y
> # CONFIG_MEGARAID_LEGACY is not set
> 
> The new megaraid driver does not detect the PERC2/DC just as I feared it
> would not.  Unless I'm missing some kernel commandline arguments necessary
> to make the new driver find the card, I'm stuck with legacy.

Oh well.  I was just guessing - I've never even seen a megaraid controller,
sorry.

> > 
> > > Distro: Gentoo Linux
> > > Kernel: 2.6.17-gentoo-r7
> > > 
> > > Hardware:
> > > Motherboard: Tyan Thunder i7501 Pro (S2721-533)
> > > CPUs: Dual 2.8Ghz P4 HT Xeons
> > > RAM: 4GB registered (3/1 split, flat model)
> > > RAID: Dell PERC2/DC (AMI Megaraid 467)
> > > SCSI: Adaptec AHA-2940U2/U2W PCI
> > > NICs: onboard e100 and dual onboard e1000
> > > 

Did it work correctly under any earlier kernel version?  If so, which?
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