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:
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
...which I think is because the IDE controller isn't really
recognized, or is pretending to be a SATA controller:
# lspci -v | less
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: Hewlett-Packard Company: Unknown device 3208
Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 193
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at 1470 [size=16]
All the google hits I've seen so far imply I have to build a kernel module
but I'd rather not get into the business of rolling my own kernel if I
don't have to.
I spun through the HP support page for this box/OS combo, and I don't see
any SATA/IDE/ATA drivers, only SCSI/SAS drivers.
So before I continue on, can I get a sanity check here -- am I barking
up the right tree?
--
/oo/
/ /() David Mackintosh |
dave@xdroop.com | http://www.xdroop.com
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06-02-2008, 03:27 PM
Linux
DMA mode
On Mon, Jun 2, 2008 at 6:22 PM, David Mackintosh
<David.Mackintosh@xdroop.com> wrote:
> ...which I think is because the IDE controller isn't really
> recognized, or is pretending to be a SATA controller:
For my cruiosity, what is your current kernel version?
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06-02-2008, 04:03 PM
David Mackintosh
DMA mode
On Mon, Jun 02, 2008 at 06:27:55PM +0300, Linux wrote:
> For my cruiosity, what is your current kernel version?
# uname -a
Linux stargate3 2.6.9-67.0.15.EL #1 Thu May 8 10:39:19 EDT 2008 i686 i686 i386 GNU/Linux
yum check-update doesn't show any available kernels, so I presume I'm current.
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06-03-2008, 08:17 AM
"Tom G. Christensen"
DMA mode
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
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06-03-2008, 08:54 AM
Paul Schoonderwoerd
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
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06-05-2008, 01:12 PM
David Mackintosh
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.
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06-09-2008, 09:25 AM
"Tom G. Christensen"
DMA mode
David Mackintosh wrote:
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.
Well I don't remember the exact query I did however I just now searched
for "DL140 Linux SATA" and the third hit is to a thread on the HP ITRC
forums with the suggested fix.
-tgc
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DMA mode
