Messages in this thread | | | From | dep <> | Subject | Re: IDE DMA problems on 2.4.0 with vt82c686a driver | Date | Thu, 11 Jan 2001 09:38:26 -0500 |
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On Thursday 11 January 2001 08:33 am, James Brents wrote:
| Since this looks like either a chipset, drive, or driver problem, I | am submitting this. | I have recently started using DMA mode on my harddisk. However, I | occasionally (not often/constant, but sometimes) get CRC errors: | hda: dma_intr: status=0x51 { DriveReady SeekComplete Error } | hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
welcome to the club. if you are given an answer off-list to this, i'd love a copy, because i've had the same issue for six months now. some have said that it's crosstalk in the cable -- in which case, all three of the 80-conductor cables i've tried are insufficiently shielded and we're in need of premium 80-conductor cables. and i found this in the november 200 linux journal, page 82, last paragraph, in an article on the ultimate linux box written by don marti:
"earlier this year, kernel hacker andre hedrick, the maintainer of linux's ide driver, tracked a user's problem to the fact that western digital drives don't do error checking correctly. he posted to linux-kernel, 'wdc drives blow off the crc check of udma . . . . this is bad and stupid.' western digital fired back on their web site with, 'if there's a problem using these drives in linux the problem most likely lies with the software driver and not the hard drive itself.' i'm going to believe the kernel hacker over the hardware vendor and stay away from western digital drives for awhile."
this suggests a.) that we need to gently pressure the w.d. people to come up with a fix or provide the specs necessary to fashion one -- the latter being preferable -- and b.) that we need to figure out some sort of hack that does -- what? in my experience, these error messages actually signify nothing, but they're using up cycles. can they be safely supressed? beats me. but they sold a hell of a lot of these things.
though i've noticed that the problem seems to be limited to those of us who have via chipset motherboards, suggesting that it is limited to that chipset, that chipset is ubiquitous, or via chipset motherboard owners are generally the complaining type. no idea which applies there, either.
-- dep -- bipartisanship: an illogical construct not unlike the idea that if half the people like red and half the people like blue, the country's favorite color is purple. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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