Is it the ITE IT8212 ATA RAID Controller ?
I would suspect that raid card - the few I've tried didn't work well even with the manufacturer's supplied windows drivers. The linux drivers might not be any better.
I'm not sure why you distrust DMA, or if it's just on this one card that you have problems with it. ATA is being phased out now, it became a very mature and reliable technology its it final years.
Motherboards with onboard ATA66/100/133 ports became extremely reliable. As long as you used the 80 wire cables.
Unfortunately, a good controller is hard to find. I used to like Promise as a windows controller. They were very reliable if you had the lastest firmware and drivers. But I don't know if they work well in linux, or even how well their current models work. (been a while since I've used one)
On Thu, 13 Jan 2011, compdoc wrote:
To: centos@centos.org From: compdoc compdoc@hotrodpc.com Subject: Re: [CentOS] Kernel Errors Present
Is it the ITE IT8212 ATA RAID Controller ?
Yes it is a card with that ITE8212 chip on it.
I had to reflash the BIOS on the card, to make it work in standard IDE mode. There's one BIOS download for RAID functionality, and another for 100% ATAPI functions. So it's either a RAID card, or a plain IDE card. You cannot switch between RAID functionality and standard IDE functionality without flashing the BIOS on the PCI card.
I'm monitoring the drives performance, and waiting to see if there are any more dma errors reported by logwatch. Nothing so far in /var/log/messages :)
Keith
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Keith Roberts