incredibly slow ATA HD - HDIO_SET_DMA failed: Operation not permitted

[Hannes Mayer]

Hi all!

My fedora HD on an extra ATA controller is very slow. Only about 2MB/s(!):

# hdparm -t /dev/hde

/dev/hde:
  Timing buffered disk reads:    6 MB in  3.02 seconds =   1.98 MB/sec

I assume the problem is that DMA is disabled ?

# hdparm /dev/hde

/dev/hde:
  multcount    = 16 (on)
  IO_support   =  0 (default 16-bit)
  unmaskirq    =  0 (off)
  using_dma    =  0 (off)
  keepsettings =  0 (off)
  readonly     =  0 (off)
  readahead    = 256 (on)
  geometry     = 58246/16/63, sectors = 58711968, start = 0

But when I try to enable DMA I get this:

# hdparm -d1 /dev/hde

/dev/hde:
  setting using_dma to 1 (on)
  HDIO_SET_DMA failed: Operation not permitted
  using_dma    =  0 (off)

# lspic -v
[...]
02:04.0 Unknown mass storage controller: Integrated Technology Express, 
Inc. IT/ITE8212 Dual channel ATA RAID controller (PCI version seems to 
be IT8212, embedded seems (rev 11)
         Subsystem: Integrated Technology Express, Inc.: Unknown device 0001
         Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 11
         I/O ports at a800
         I/O ports at ac00 [size=4]
         I/O ports at b000 [size=8]
         I/O ports at b400 [size=4]
         I/O ports at b800 [size=16]
         Capabilities: [80] Power Management version 2

On google I read that drivers for the chipset are missing...
Since I'm recompiling the kernel anyway to get NTFS support, I'd
appreciate any hints what to include in the kernel.

Thanks a lot,
Hannes.