VIA chipset discussion
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Quoted 17 lines · David D.W. Downey
OK, currently at work so I don't have the affected system in front of me. I'm doing this from memory..
My apologies to those that responded to me. I've been unable to work on this issue for the last few days due to work.
My particular board is the MSI 694D Pro Dual processor board. It uses the VT82C686A chipset and the PDC20265 Promise ATA100.
I'm running dual PIII-733s with 1GB of Corsair RAM. The board, CPUs, and memory all run at 133MHz. The drives are
ide0: BM-DMA at 0xb000-0xb007, BIOS settings: hda:DMA, hdb:DMA hda: WDC WD153AA, ATA DISK drive hda: 30064608 sectors (15393 MB) w/2048KiB Cache, CHS=1871/255/63, UDMA(66) ide0: BM-DMA at 0xb000-0xb007, BIOS settings: hda:DMA, hdb:DMA
Quoted 5 lines
hdb: WDC WD300BB-00AUA1, ATA DISK drive
hdb: 58633344 sectors (30020 MB) w/2048KiB Cache, CHS=3649/255/63, UDMA(66) Now to recap...
Kernel command line: BOOT_IMAGE=new ro root=304 idebus=66 hdc=ignoreide_setup: hdc=ignore -- BAD OPTION
Don't use "idebus=66". It's wrong. If you want to force UDMA66/UDMA100, the correct option is ide0=ata66. If you want to use idebus=, you should use idebus=33, because that's what your PCI bus most likely operates at.
Also "hdc=ignore" doesn't work either.
Quoted 10 lines
ide1: BM-DMA at 0xb008-0xb00f, BIOS settings: hdc:DMA, hdd:piohdc: SAMSUNG CD-ROM SC-148F, ATAPI CDROM drive
hdc: ATAPI 48X CD-ROM drive, 128kB Cache, DMAI'm experiencing consistant kernel deaths when doing any type of heavy IO as I stated earlier. I'm using the following as my test.
dd if=/dev/hda4 of=/tmp/testdd.img bs=1024M count=2k
It gets about 300MB into the file and pukes the kernel.
What does the 'puking' exactly do?
Quoted 1 line
I get lots of errors about disabling DMA within my logs.
Just this?
Quoted 7 lines
No perosnally, I believe it's a problem with the VIA chipset specifically. I've seen a couple of emails regarding the same type of problem with various setups and the commonality is the VIA chipset. How is this affecting it? I'm not quite sure. (This may already have been covered but for the purpose of making sure that I'm not chasing numerous possibilities I've ignored some of them.) I **THINK** it's a problem specifically with the DMA support.
The VIA chipsets are not easy to set up and the margins for error are too thin.
Quoted 9 lines
However, I do still get the kernel deaths even when using ATA33. I've specifically noticed that if you install mixed drives (ATA33 + ATA66 + ATA100) then the system will consistantly puke as well. Take out the ATA66 drives and things stabilize for a bit then puke. I'm not sure if dropping an ATA33 drive on there by itself is the solution even if it does completely stabilize the machine. There is no reason for the ATA66 support not to work since it's a combined controller that I'm sure the VIA driver maintainer has looked at. (He emailed me but I forgot his name. Please accept my apologies for not remembering, no disrespect is intended.)
Me, most likely.
Quoted 4 lines
Is anyone out there with as close a match to my setup as possible wish to help me with this? (I'm not discounting the mismatched setups, I just want a baseline to go from. If someone with my setup is NOT ahving trouble then I may need to look at something different).
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