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incredibly slow ATA HD - HDIO_SET_DMA failed: Operation not permitted



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.













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