Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
AAC(4)                 FreeBSD Kernel Interfaces Manual                 AAC(4)

NAME
     aac - Adaptec AdvancedRAID Controller driver

SYNOPSIS
     options AAC_DEBUG=N
     device pci
     device aac
     device aacp

DESCRIPTION
     The aac driver provides support for the Adaptec AAC family of SCSI
     Ultra2, Ultra160, and Ultra320 RAID controllers.  Supported controllers
     include:

     +o   AAC-364

     +o   Adaptec SCSI RAID 2120S

     +o   Adaptec SCSI RAID 2200S

     +o   Adaptec SCSI RAID 2410SA

     +o   Adaptec SCSI RAID 5400S

     +o   HP NetRAID 4M

     +o   Dell PERC 2/Si

     +o   Dell PERC 2/QC

     +o   Dell PERC 3/Si

     +o   Dell PERC 3/Di

     Access to RAID containers is available via the /dev/aacd? device nodes.
     Individual drives cannot be accessed unless they are part of a container
     or volume set, and non-fixed disks cannot be accessed.  Containers can be
     configured by using either the on-board BIOS utility of the card, or a
     command-line interface management application.

     The /dev/aac? device nodes provide access to the management interface of
     the controller.  One node exists per installed card.  The aliases
     /dev/afa? and /dev/hpn? exist for the Dell and HP flavors, respectively,
     and are required for the CLI management utility available from these
     vendors to work.  If the kernel is compiled with the COMPAT_LINUX option,
     or the aac_linux.ko and linux.ko modules are loaded, the Linux-compatible
     ioctl(2) interface for the management device will be enabled and will
     allow Linux-based management applications to control the card.

     The aacp device enables the SCSI pass-thru interface and allows devices
     connected to the card such as cdroms to be available via the CAM scsi(4)
     subsystem.  Note that not all cards allow this interface to be enabled.

   Tuning
     The read-only sysctl hw.aac.iosize_max defaults to 65536 and may be set
     at boot time to another value via loader(8).  This value determines the
     maximum data transfer size allowed to/from an array.  Setting it higher
     will result in better performance, especially for large sequential access
     patterns.  Beware: internal limitations of the card limit this value to
     64K for arrays with many members.  While it may be safe to raise this
     value, this is done at the operator's own risk.  Note also that
     performance peaks at a value of 96K, and drops off dramatically at 128K,
     due to other limitations of the card.

FILES
     /dev/aac?            aac management interface
     /dev/aacd?           disk/container interface
     /boot/kernel/aac.ko  aac loadable module

DIAGNOSTICS
     Compiling with AAC_DEBUG set to a number between 0 and 3 will enable
     increasingly verbose debug messages.

     The adapter can send status and alert messages asynchronously to the
     driver.  These messages are printed on the system console, and are also
     queued for retrieval by a management application.

SEE ALSO
     kld(4), linux(4), scsi(4), kldload(8), loader(8), sysctl(8)

HISTORY
     The aac driver first appeared in FreeBSD 4.3.

AUTHORS
     Mike Smith <msmith@FreeBSD.org>
     Scott Long <scottl@FreeBSD.org>

BUGS
     This driver is not compatible with Dell controllers that have version 1.x
     firmware.  The firmware version is the same as the kernel version printed
     in the BIOS POST and driver attach messages.

     The controller is not actually paused on suspend/resume.

FreeBSD 11.0-PRERELEASE        February 22, 2001       FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | FILES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS | BUGS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=aac&sektion=4&manpath=FreeBSD+5.2.1-RELEASE>

home | help