RE: HD DMA disabled in 2.4.21-rc2, works fine in 2.4.20

[Jeffrey W. Baker]

On Mon, 2003-05-19 at 12:56, Mudama, Eric wrote:
> # CONFIG_BLK_DEV_IDEDMA_FORCED is not set
> 
> I think that is the offending line?
> 
> can you enable DMA transfer modes on the drive using hdparm?

Why should force be enabled?  Forced sounds like a last resort.  If you
read this thread you will see that hdparm isn't working.  It returns
EPERM.

I was using Via IDE chipset and, yes, I had configured the kernel for
VIA support.  That's why it worked in 2.4.20.  But it stopped working in
2.4.21-rc.

Meanwhile, I have switched to 2.4.21-rc-ac, and dumped the hardware in
favor of Intel i865, and DMA is working again.

-jwb