ahci man page on OpenBSD

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AHCI(4)			  OpenBSD Programmer's Manual		       AHCI(4)

     ahci - Advanced Host Controller Interface for Serial ATA

     ahci* at pci?
     ahci* at jmb?
     scsibus* at ahci?

     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 <dlg@openbsd.org> and
     Christopher Pascoe <pascoe@openbsd.org>.

OpenBSD 4.9			March 22, 2010			   OpenBSD 4.9

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