Re: [gentoo-user] hdparm "HDIO_SET_DMA failed"

[Peter Gordon]

Grant wrote:

HDIO_SET_DMA failed: Operation not permitted

Does the kernel you built for those have support for the appropriate IDE
controller chipset? You can get this information with
`lspci | grep IDE'. (lspci is part of the sys-apps/pciutils package.)

For example on my system I have a VIA 82CXXX IDE controller:
0000:00:07.1 IDE interface: VIA Technologies, Inc. \
  VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)

So I set CONFIG_BLK_DEV_VIA82CXXX=y in kernel configuration.
For the 2.6 kernel series you should choose the appropriate option:
Device Drivers ->
   ATA/ATAPI/MFM/RLL support ->
      Enhanced IDE/MFM/RLLdisk/cdrom/tape/floppy support ->
         PCI IDE chipset support ->
            Generic PCI bus-master DMA support ->
               <*> Your IDE Controller chipset

Hope that helps!

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