incredibly slow ATA HD - HDIO_SET_DMA failed: Operation not permitted
Hannes Mayer
fedora at ancientcoins.biz
Thu May 20 16:48:04 UTC 2004
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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