aac.4freebsd

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Version: 300747 (debian - 07/07/09)

Section: 4 (Pilotes et protocoles réseau)

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NAME

aac - Adaptec AdvancedRAID Controller driver

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:
device pci device aac device aacp

To compile in debugging code: options AAC_DEBUG=N

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

 aac_load="YES"

DESCRIPTION

The driver provides support for the Adaptec AAC family of SCSI Ultra2, Ultra160, and Ultra320, SATA and SAS RAID controllers.

Access to RAID containers is available via the /dev/aacd? device nodes. The aacp device enables the SCSI pass-thru interface and allows devices connected to the card such as CD-ROMs to be available via the CAM scsi(4) subsystem. Note that not all cards allow this interface to be enabled.

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 compatibility with the Dell and HP versions of management tools, respectively. 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.

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.

HARDWARE

Controllers supported by the driver include:

FILES

/dev/aac?
aac management interface
/dev/aacd?
disk/container interface

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 driver first appeared in Fx 4.3 .

AUTHORS

An Mike Smith Aq msmith@FreeBSD.org An Scott Long Aq 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.