[ILUG] IDE DMA problem

[Wesley Darlington]

Hi,

On Tue, Jun 27, 2000 at 02:36:57PM +0100, Niall O Broin wrote:
> I've been trying to tune my IDE performance using hdparm but it refuses to
> turn on DMA with the following error
> 
> bagend:~ # hdparm -d 1 /dev/hdd
>  
> /dev/hdd:
>  setting using_dma to 1 (on)
>  HDIO_SET_DMA failed: Operation not permitted
>  using_dma    =  0 (off)
>  
>  
> and I have the following in my dmesg output 
> 
> Uniform Multi-Platform E-IDE driver Revision: 6.20

I'm guessing here - it looks like your onboard ide hardware has
been detected and is being controlled by a sub-optimal ide driver.
Can you build a new kernel with only the default ide drivers in it 
and give that a whirl?

Is your bios the latest version too?

All the best,
Wesley.

> ALI15X3: IDE controller on PCI bus 00 dev 78
> ALI15X3: not 100% native mode: will probe irqs later
> ALI15X3: simplex device:  DMA disabled
> ide0: ALI15X3 Bus-Master DMA disabled (BIOS)
> ALI15X3: simplex device:  DMA disabled
> ide1: ALI15X3 Bus-Master DMA disabled (BIOS)
> hda: IBM-DJNA-370910, ATA DISK drive
> hdb: IOMEGA ZIP 100 ATAPI, ATAPI FLOPPY drive
> hdc: CD-532E-B, ATAPI CDROM drive
> hdd: IBM-DTTA-351680, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: IBM-DJNA-370910, 8693MB w/1966kB Cache, CHS=1108/255/63
> hdd: IBM-DTTA-351680, 16124MB w/462kB Cache, CHS=32760/16/63 
> 
> I don't know what the DMA disabled (BIOS) is about as I have IDE Ultra DMA
> set to AUTO (only other choice is off) and DMA/PIO setting for all the
> drives set to AUTO also. I have also tried selecting various DMA/PIO
> settings for the drives but I always get the  DMA disabled (BIOS) message.
> The motherboard is an ASUS P5A with an AMD K6-III 450. Any hardware mavens
> out there with all knowledge and wisdom ?