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. > I thought ICH8 supported AHCI, but maybe it's only ICH8R that does? All ICH8 support AHCI, though not all BIOSes initialize them respectively. The only benefit of ICH8R is a port multipliers support, though it also seems to be artificial limitation - I've seen BIOS allowing it on regular ICH8. > I'm assuming that "subclass = ATA" means the controller can't operate in AHCI > mode. Yes. At least it is not configured to do so. > The BIOS setting is also confusing. It has two options, "Normal" and > "Legacy." "Normal" mode says, "The hard drive controller is configured for > native mode. This mode provides the highest drive performance and most > flexibility." I guess I misinterpreted "native mode" to be AHCI mode. "Native" mode means that ATA controllers works as normal PCI device. In "Legacy" mode controller uses legacy ISA I/O ports and IRQs. -- 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"
