Re: [CentOS] Re: DMA mode
On Tue, Jun 03, 2008 at 10:17:14AM +0200, Tom G. Christensen wrote: Google suggests booting with ide0=noprobe ide1=noprobe to make sure the ata-piix driver is used. If you don't want to reinstall then make sure initrd contains the ata-piix driver and that references to /dev/hd* are replaced with /dev/sd* in fstab etc. Hi Tom, I can also confirm that this works, thank you for the assistance. Can I ask what you used as your google query? I think I missed something obvious. -- /\oo/\ / /()\ \ David Mackintosh | [EMAIL PROTECTED] | http://www.xdroop.com pgpHiRzfw0I3O.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: DMA mode
On Tuesday 03 June 2008 10:17, Tom G. Christensen wrote: David Mackintosh wrote: Hi folks, I have an HP Proliant 140DL G2 server with what appears to be an IDE drive in non-DMA mode. Performance on the server is extremely bad when large amounts of disk activity is taking place. I think the problem is that my drive is not in DMA mode: # hdparm /dev/hda This should be /dev/sda and not /dev/hda which means you're most likely using the generic-ide driver and not ata-piix. Google suggests booting with ide0=noprobe ide1=noprobe to make sure the ata-piix driver is used. If you don't want to reinstall then make sure initrd contains the ata-piix driver and that references to /dev/hd* are replaced with /dev/sd* in fstab etc. -tgc Timing is everything ! I found the exact same problem on a HP Proliant ML110 at the exact time I read this. Adding the ide0=noprobe to grub.conf instantly solved the problem. fstab picked it up itself without any changes and the disks now show up as sda. The 'hdparm -t disk went from 3.6 MB/s with /devhda to 76MB/s with /dev/sda. This would be a good one for the wiki. (or maybe it's already there, didn't check) So thanks Tom for you answer. Greatly apreciated (here also). Regards, Paul Schoonderwoerd Pollux IT ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
