HW Raid poor io performance Post: 302461304

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LEARN ABOUT OPENSOLARIS

ahci

ahci(7D)							      Devices								  ahci(7D)

NAME

       ahci - Advanced Host Controller Interface SATA controller driver

SYNOPSIS

       sata@unit-address

DESCRIPTION

       The ahci driver is a SATA framework-compliant HBA driver that supports SATA HBA controllers that are compatible with the Advanced Host Con-
       troller Interface 1.0 specification. AHCI is an Intel-developed protocol that describes the register-level interface for  host  controllers
       for  serial  ATA  1.0a  and Serial ATA II. The AHCI 1.0 specification describes the interface between the system software and the host con-
       troller hardware.

       The ahci driver currently supports the Intel ICH6/7/8/9, VIA vt8251 and JMicron AHCI controllers which are compliant with the Advanced Host
       Controller  Interface  1.0  specification.  Note that while the	Intel ICH6/7/8/9, VIA vt8251 and JMicron AHCI controllers support standard
       SATA features, the ahci driver currently only supports hard disk, ATAPI SATA DVD, hotplug and NCQ (Native command queuing). Port multiplier
       and power management  are not yet supported.

CONFIGURATION

       The ahci module contains no user configurable parameters.

FILES

       /kernel/drv/ahci

	   32-bit ELF kernel module (x86).

       /kernel/drv/amd64/ahci

	   64-bit ELF kernel module (x86).

ATTRIBUTES

       See attributes(5) for descriptions of the following attribute:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |x86			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWahci			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cfgadm(1M), cfgadm_sata(1M), prtconf(1M), sata(7D)

       Advanced Host Controller Interface 1.0

       Writing Device Drivers

NOTES

       To bind the ahci driver to your controller, choose the [AHCI] BIOS option.

       Note that booting is not supported if toggle exists between the [IDE] and [AHCI] BIOS options

SunOS 5.11							    22 Jan 2008 							  ahci(7D)