On 11-05-02 02:52 PM, Alan Cox wrote:

The queue depth and tag limits come from the SATA standard and also leak
fairly comprehensively into the AHCI spec so not unless the hardware has
extensions for it and is merely faked SATA (and if you are faking SATA
you have to wonder why if your goal is max performance)

The reason to "fake" SATA and/or ATA is unchanged since the 1990s:
so that the system BIOS can boot from the device, and the operating system
can work up to the point where it finally loads hardware-specific drivers.

Cheers