Re: Problem Setting DMA

["Thomas H. George" <tom@spininternet.com>]

On Wed, Apr 27, 2005 at 04:08:19PM +0100, Dave Ewart wrote:
> On Wednesday, 27.04.2005 at 10:51 -0400, Thomas H. George wrote:
> 
> > The response to the command hdparm -d 1 /dev/hdb is
> > 
> >    /dev/hdb:
> >      Setting using-dma to 1 (on)
> >       HDIO_SET-DMA failed: Operation not permitted
> >       using_dma      =   0  (off)
> > 
> > yet
> > 
> >    ll /proc/ide/hdb
> > 
> > shows root has rw permissions for the settings file and the file contains
> > 
> > Name                  Value      Min      Max      Mode
> > using_dma            0            0            1            rw
> > 
> > Since root has read/write permissions to this file, could - should? - I 
> > edit it and change the Value to 1?
> > 
> > hdb is a relatively new - purchased Dec. 2003 - 80 GB Western Digital drive.
> 
> Can't say for sure whether what you suggest with editing /proc/ide/hdb
> is a good idea or not, but it sounds like The Wrong Way.
> 
Yes, it felt wrong.

> The error you are reporting suggests to me that your IDE *controller* is
> not properly supported by your current kernel?
> 
> Can you show us the results of 'lspci' and 'uname -r'
> 
> Dave.
> -- 
The result of uname -r is 2.6.8.  I compiled this kernel from the latest
Debian kernel-source-2.6.8.

The result of lspci is:

0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600
AGP] Host Bridge
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8235 PCI Bridge
0000:00:09.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1
(rev 07)
0000:00:09.1 Input device controller: Creative Labs SB Live! MIDI/Game
Port (rev 07)
0000:00:0b.0 Network controller: Intersil Corporation Prism 2.5 Wavelan
chipset (rev 01)
0000:00:0c.0 FireWire (IEEE 1394): Lucent Microelectronics FW323 (rev
61)
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 80)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 80)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 80)
0000:00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
0000:00:11.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
0000:00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
> 

If the kernel does not support this IDE controller, what next?  A new
motherboard?

Tom