Tecra A9 - compatibility/AHCI in the BIOS mode

The Toshiba Tecra A9 seems to have a serious lack of implementation of the BIOS: it has an Intel ICH8 - M - SATA controller capable of running in Intels so-called "handset Mode" that allows it to act as a controller SATA AHCI, a normal IDE controller or mix the two for various channels.
The BIOS allows to adjust it to the "compatibility" - mode that seems to work correctly by running in the IDE for all channels mode, but the mode "AHCI" seems to be set up wrongly. AHCI is a standard for SATA devices that is widely used and the Tecra A9 defines only the hard disk to use SATA AHCI - optical drive CD/DVD-ROM rest in IDE mode which leads to conflicts of pilots as only one driver can access the controller in DMA mode - when the value of both SATA and IDE modes, two drivers are needed for one physical chip.
'AHCI' in the BIOS must activate the peripheral subject connected to the controller is running in SATA AHCI mode, but as I already said, it is not. Only the hard drive will be displayed as SATA device.

For me, this looks like a defect in the BIOS that needs to be repaired.

Best regards
Peter

Hello

I think that it s perhaps a default, but you done already encountered problems with the execution of the "compatibility mode" where the CD/DVD drive (IDE ;)) works in "IDE mode"?

Do you have a few mistakes or something similar? If so, then it s probably REALLY a bug, but if not, maybe this 'combined mode' (I know what you´re talking about my old 875P Chipset and my ICH5 have the same thing) works correctly.
In my machine (desktop computer with a DFI Lanparty 875P and northwood at 3 Ghz) runs in the "handset mode" so that everything works to make it compatible in "IDE" mode But I Don t a loss of performance.
It s not as fast when I drive in pure SATA mode, but then my DVD won't work.

So, if you have problems with the machine then I agree, otherwise "it s not a bug, it s a feature" ;)

Welcome them

Tags: Toshiba

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