[Bug 294123] Re: 2.6.27 SATA drives not accessible at boot time, 2.6.24 working

[mklemm]

I just did som investigation of the source code of ata_piix.c and although I'm not familiar with driver programming I think the issue is that ata_piix sees my sata controller, which is in IDE mode, and cannot be switched to AHCI, as a controller in AHCI mode.
In the dmesg output I see 

MAP [P0 P2 P1 P3]

whereas in the sourcecode in kernel 2.6.31.4 drivers/ata/ata_piix.x,
line 394, it looks like it should actually read

MAP [P0 P2 IDE IDE]

for a controller in IDE mode, according to the source comments.

Is there a way to force the ata_piix driver into IDE mode in some way?

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2.6.27 SATA drives not accessible at boot time, 2.6.24 working
https://bugs.launchpad.net/bugs/294123
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