Re: ATA 100 & VIA and linux-2.4.3ac8

Manuel Ignacio Monge Garcia (ignaciomonge@navegalia.com)
Wed, 18 Apr 2001 22:21:53 -0400

El Mié 18 Abr 2001 15:16, escribiste:
> I don't know about other possible problems with the kernel, but you must
> use an 80 wire IDE cable for UDMA66/100 to work.
>
> > -----------------------Primary IDE-------Secondary IDE------
> > Cable Type: 40w 40w

Strange thing. With previous version of kernel (2.4.1 I think), I
haven't got this problem. May be a bios detection problem?

Extract from /usr/src/linux/drivers/ide/via82cxxx..c:

*
* PIO 0-5, MWDMA 0-2, SWDMA 0-2 and UDMA 0-5
*
* (this includes UDMA33, 66 and 100) modes. UDMA66 and higher modes are
* autoenabled only in case the BIOS has detected a 80 wire cable. To ignore
* the BIOS data and assume the cable is present, use 'ide0=ata66' or
* 'ide1=ata66' on the kernel command line.
*

I've tried with ide0=ata100, but this options doesn't work.
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