Paul Mather wrote: > On Jun 30, 2010, at 5:18 PM, Alexander Motin wrote: >> Paul Mather wrote: >>>> PS: ATA_STATIC_ID is useless when ATA_CAM option enabled. >>> Thank you (and Jeremy Chadwick) for the help and information. The kernel >>> configuration options I used above were taken from a VirtualBox >>> FreeBSD/amd64 install I have that I converted over to ATA_CAM when the code >>> first went into RELENG_8 and it wasn't exactly clear at the time what >>> options were absolutely required. (I'm not even sure that "options >>> ATA_CAM" is needed any more, given "device ahci" implies it.) >> `options ATA_CAM` enables CAM wrapper for legacy drivers, which gave you >> adaX devices instead of adX. It doesn't give major benefits, just >> unifies behavior. > > So, does that mean if you omit "options ATA_CAM" and have "device ahci" you > will get adX devices, not adaX devices? In other words, if you have "device > ahci" (or "device siis" or "device mvs") will you will always get adaX > devices, whether or not you have "options ATA_CAM" in your kernel config file?
If you have ahci, siis and mvs drivers in kernel, but no "options ATA_CAM", you will get adaX devices for native SATA controllers, supported by these three drivers and adX for other (legacy) ones. > Does "options ATA_CAM" work with "device ata" or the modular ATA subsystem? Both. It is an option of "device atacore", which is part of "device ata" > Is that the intended use of "options ATA_CAM": to provide adaX devices and a > CAM interface for accessing ATA devices? Yes. It disables ATA peripheral drivers and bus management code, allowing CAM ones to be used on top of the ATA controller drivers. -- Alexander Motin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
