> actual SCSI commands, just the kernel's API that is normally used to > interface to SCSI host adapters to send the SCSI command) into commands for > the various ATA controllers. At least that is my high-level understanding of > the mechanism. Roughly speaking thats correct. It also handles the low level stuff like probing which is ATA specific along with the bus level protocol for those controllers that don't do it themselves. Basically ATAPI devices (CD/TAPE/etc) are SCSI over ATA so each command is wrapped in an ATAPI PACKET command and issued. For ATA some translation is done for both commands and errors but the translations are pretty simple. Alan
