Is DMA/66 supported?
Hello,
I've compiled kernel 2.3.99-pre3 today, enabling DMA, etc. I have a
DFI motherboard which has a Apollo Pro Plus chipset (which supports
DMA66), and a Western Digital Caviar HD (15.3 gb), which also support
DMA66... But although my BIOS tells me that it's possible to use
DMA/66 with this HD, Linux doesn't seem to be using it. Below is what
I get at startup (hda is the HD capable of DMA/66). So, my question
is... Is UDMA/66 supported in Linux today? If not, could it be that
it'll soon be? If it is... Then what else would I have to do?
I tried some FAQS and Howtos, and also a web search, but only found
vague references to it... Some people saying they were not able to
use DMA/66...
Thanks,
J.
Uniform Multi-Platform E-IDE driver Revision: 6.30
ide: Assuming 40MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller on PCI bus 00 dev 39
VP_IDE: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:pio, hdd:DMA
hda: WDC WD153BA, ATA DISK drive
hdd: CD-ROM 50X, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: WDC WD153BA, 14669MB w/2048kB Cache, CHS=1870/255/63, UDMA(33)
hdd: ATAPI 50X CD-ROM drive, 128kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.07
--
Jeronimo Pellegrini
Institute of Computing - Unicamp - Brazil
http://www.dcc.unicamp.br/~jeronimo
mailto:jeronimo@dcc.unicamp.br mailto:pellegrini@iname.com
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