RE: Problems setting DMA
Which motherboard are you using? If you are using one with the ALi 15XX
chipset, then you cannot set dma via hdparm...you'd have to fetch a patch
for the kernel and enable dma via the kernel....the patch is
kernel-ide-2.2.17 (for the 2.2.17 kernel) or something like that (can't
rememebr the exact name)....once patched, you will see under block devices
the option to enable dma...
HTH
Patrick Cheong
Information Systems Assurance
Measat Broadcast Network Systems
e-mail: mailto:patrick_cheong@astro.com.my
Visit us at: http://www.astro.com.my
> -----Original Message-----
> From: Lazar Fleysher [SMTP:fleysher@chudo.lanl.gov]
> Sent: Friday, October 20, 2000 1:41 AM
> To: Leonardo Dias
> Cc: Debian User
> Subject: Re: Problems setting DMA
>
> I have a similar problem. Maybe even worse.. If I change the way the hard
> drives are connected (like swap hda and hdb), changin the master/slave
> jumpers, the system does not boot at all...
> I had to find, what it seems a unique configuration in which it boots, but
> no DMA on the second IDE channel. I could turn DMA on with hdparam and as
> soon as I accessed the disk, it was disabled as in your case...
> I gave-up... I blame it on the stupid PIIX (Triton) chip, I have...
> Or maybe I am stupid, which is possible too :-)
> Anyway, I am following this thread with interest... :-)
>
>
> > Then I'll run a program that requires a disk read, such as, for example,
> > find /
> >
> > It locks for a while (about ten seconds) then I run dmesg. The last
> > lines are self-explanative:
> >
> >
> > hdc: timeout waiting for DMA
> > hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> > hdc: timeout waiting for DMA
> > hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> > hdc: timeout waiting for DMA
> > hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> > hdc: timeout waiting for DMA
> > hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> > hdc: DMA disabled
> > ide1: reset: success
> >
> >
> > The system disables DMA. It gives me an IRQ timeout.
> >
> > BIOS is fine. Everything is fine but DMA. What should I do? Break my
> > MotherBoard in half? :-))
> >
> > I've already tried hdparm -c 0, -c 1, -c 2, -c 3. I've also tried hdparm
> > -u 1. Results: Still no DMA.
> >
> > Wierd, eh?
>
>
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