AHCI(4) BSD Kernel Interfaces Manual AHCI(4)
ahci -- Advanced Host Controller Interface for Serial ATA
ahci* at pci?
ahci* at jmb?
The ahci driver provides support for Serial ATA controllers conforming to
the Advanced Host Controller Interface specification.
Several AHCI capable controllers also provide a compatibility mode that
causes them to appear as a traditional ATA controller supported by
Although ahci controllers are actual ATA controllers, the driver emulates
SCSI via a translation layer.
Setting the lowest bit (0x1) of the driver flags forces ahci to negotiate
SATA 1 (1.5 Gb/s) transfer speeds only. It may be useful where higher
speeds are unstable.
intro(4), jmb(4), pci(4), pciide(4), scsi(4)
The ahci driver first appeared in OpenBSD 4.1.
The ahci driver was written by David Gwynne <email@example.com> and
Christopher Pascoe <firstname.lastname@example.org>.
BSD July 16, 2013 BSD