On 03.12.18 11:35, Felix Held wrote: >> No idea why combined mode is the default, it's only useful for OSes from >> the '90s. It's not about the type of drives (SATA vs PATA) connected but >> how the SATA controller identifies itself to the OS.> > I agree that the combined mode isn't the best default, but I can't say > that it's totally useless. In combined mode you have the first 4(?) SATA > ports connected to an AHCI controller and the last 2(?) to a legacy > IDE/ATA controller. I had some SATA->PATA bridge to connect a PATA > device to a mainboard and the adapter I had only worked on SATA ports > that were connected to a legacy IDE/ATA controller, but not on SATA > ports connected to an AHCI controller. I didn't further debug that issue > though, so I can't say why it didn't work on an AHCI controller.
Interesting use case. I missed that the combined mode is also the only mode where you have SATA ports on AHCI and the legacy interface. I also don't know if an IDE drive should work with AHCI. My guess would be yes, but OS drivers probably don't expect it. Nico -- coreboot mailing list: [email protected] https://mail.coreboot.org/mailman/listinfo/coreboot
