Messages in this thread |  | | Subject | Summary of kt333a woes, with happy ALi ending | From | "Joseph N. Hall" <> | Date | Thu, 5 Sep 2002 22:33 -0700 |
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Also FYI: the Soyo Dragon Ultra Platinum m/b never did give me proper DMA performance on my ATAPI devices. I tried:
stock RH 7.3 kernel 2.4.19 2.4.20-pre5-ac1
The stock kernel might not have had proper DMA support at all; I upgraded to 2.4.19 quickly for other reasons. The most obvious problem with 2.4.19 and 2.4.20-pre5-ac1 was that my IDE DVD-R/RAM/ROM device did not do DMA, ever, and when forced to attempt DMA the machine eventually locked, with no error messages that I ever saw. It works fine with my new Iwill m/b:
[joseph@dhcppc5 ticket]# hdparm -I /dev/hdd
/dev/hdd:
ATAPI CD-ROM, with removable media Model Number: MATSHITADVD-RAM LF-D310 Serial Number: Firmware Revision: A123 Standards: Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(can be disabled) DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=180ns IORDY flow control=120ns
Nor did other ATAPI devices do DMA--I tried a generic CDROM and an ASUS CDR/RW/ROM. I saw the same behavior when the ATAPI devices were plugged into the Highpoint controller.
Also HD access seemed slow at times, and there would occasionally be mysteriously long pauses of a few sec during kernel compiles etc. where it seemed that some sort of I/O blocking was going on.
I observed similar behavior in Win2k but ... I don't know that I ever got a proper set of drivers installed. All I know is that with the IWill m/b (ALi chipset) everything is working OK. I did not get proper DVD playback on Win2k--it seemed exactly the same slowness as with Linux.
OTOH my DVDs play fine off the drive from mplayer now, and I can read and write at appropriate speeds.
I would like to get the kt333a m/b working eventually, because I don't think my IWill m/b will support the new core Athlons. I suspect that the board "works" but there must be a BIOS or chipset issue that isn't resolved.
-joseph
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