Re: IDE SiS730 / SiS5513 incorrect defaults kernel 2.4.9

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 12 Nov 2001 18:14:56 +0000 (GMT)

> Oct 22 12:46:12 accessgroupinc kernel: hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> Oct 22 12:46:12 accessgroupinc kernel: hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }

Cable error. At least thats what the drive saw and the checksum is
computed controller<->drive without our involvement

> My primary concern is that the IDE driver seems to be making different
> choices in 2.4.9-13 for this chipset, and earlier kernels are making
> better choices -- or possibly failing silently? In any case, I

It may be the new kernel is smart enough to enable UDMA 100 and the cables
are marginal. The CRC error is a corruption that is then retried. Multiple
retries cause the kernel to drop to a lower UDMA speed
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