The
artsata driver supports the Intel i31244 Serial ATA and controllers, and provides the interface with the hardware for the
ata(4) driver.
The 0x0002 flag forces the
artsata driver to disable DMA on chipsets for which DMA would normally be enabled. This can be used as a debugging aid, or to work around problems where the SATA controller is wired up to the system incorrectly.