linux-kernel - Re: Question on siig sata 3 controller

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Message-ID: <20100810134817.GA25874@bitwizard.nl>
Date:	Tue, 10 Aug 2010 15:48:18 +0200
From:	Rogier Wolff <R.E.Wolff@...Wizard.nl>
To:	Alan <alan@...eserver.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Rogier Wolff <R.E.Wolff@...Wizard.nl>,
	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org
Subject: Re: Question on siig sata 3 controller

On Tue, Jun 15, 2010 at 10:25:32AM -0700, Alan wrote:
> On Tue, 2010-06-15 at 16:01 +0100, Alan Cox wrote: 
> > > Is one of these modules the driver for this controller? I think it's
> > > AHCI: lshw says it uses ports cc00 ... and a bunch of others, and
> > > those ports are claimed by ahci according to /proc/ioports. Ah! I need
> > > better eyes. lshw already mentions that it's ahci...
> > 
> > AHCI will be driving it.
> 
> I have seen this problem with the 2.6.33 kernel in Fedora 13. The
> problem goes away in 2.6.35-rc3. (Though networking is fubared for me on
> that kernel, so I have not migrated to it.)
> 
> My understanding is the "fix" in the driver was to blacklist ncq for
> that controller. I have not verified that yet.

One of my disks died again a while ago. So I went to the machine to
replace the drive. But I forgot to write down which one had died. So I
started it up again. Now I had 7 disks again like before, but a
different drive was now "gone". So my RAID had only 6 out of 8 drives
and was "gone". Together with some 4.7T worth of data on it.... 

Next I went to the machine with a spare sata card. I removed the
drives from the ASUS U3S6 card, and put them on the old pci sata card. 

By the time I logged in on the machine, the RAID had found 8/8 drives
and I think it had already started rebuilding..... 

I now haven't had any problems with the drives in more than a week.

Performance of the raid has dropped from 600Mb to around 400Mb/sec,
obviously because the PCI card cannot handle 200Mb/sec of disk IO. 

I'm open to suggestions for cheap highperformance WORKING PCIe sata
cards.... 

	Roger. 

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