.\" Copyright (c) 2000 Scott Long
.\" All rights reserved.
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.\" $FreeBSD: src/share/man/man4/aac.4,v 1.31.2.1.2.1 2006/12/14 23:56:26 brueffer Exp $
.\" $DragonFly: src/share/man/man4/aac.4,v 1.8 2008/09/02 11:50:46 matthias Exp $
.Dd May 8, 2009
.Dt AAC 4
.Os
.Sh NAME
.Nm aac
.Nd Adaptec AdvancedRAID Controller driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd device pci
.Cd device aac
.Cd device aacp
.Pp
To compile in debugging code:
.Cd options AAC_DEBUG=N
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
aac_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for the Adaptec AAC family of SCSI Ultra2, Ultra160,
and Ultra320, SATA and SAS RAID controllers.
.Pp
Access to RAID containers is available via the
.Pa /dev/aacd?
device nodes.
The
.Nm 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
.Xr scsi 4
subsystem.
Note that not all cards allow this interface to be enabled.
.Pp
The
.Pa /dev/aac?
device nodes provide access to the management interface of the controller.
One node exists per installed card.
The aliases
.Pa /dev/afa?
and
.Pa /dev/hpn?
exist for compatibilty with the Dell and HP versions of management tools,
respectively.
If the kernel is compiled with the
.Dv COMPAT_LINUX
option, or the
.Pa aac_linux.ko
and
.Pa linux.ko
modules are loaded, the
Linux-compatible
.Xr ioctl 2
interface for the management device will be enabled and will allow
Linux-based management applications to control the card.
.Ss Tuning
The read-only sysctl
.Va hw.aac.iosize_max
defaults to 65536 and may be set at boot time to another value via
.Xr 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.
.Em 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
.Em 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.
.Sh HARDWARE
Controllers supported by the
.Nm
driver include:
.Pp
.Bl -bullet -compact
.It
Adaptec AAC-364
.It
Adaptec SAS RAID 4000SAS
.It
Adaptec SAS RAID 4005SAS
.It
Adaptec SAS RAID 4800SAS
.It
Adaptec SAS RAID 4805SAS
.It
Adaptec SATA RAID 2020SA ZCR
.It
Adaptec SATA RAID 2025SA ZCR
.It
Adaptec SATA RAID 2026ZCR
.It
Adaptec SATA RAID 2410SA
.It
Adaptec SATA RAID 2420SA
.It
Adaptec SATA RAID 2610SA
.It
Adaptec SATA RAID 2620SA
.It
Adaptec SATA RAID 2810SA
.It
Adaptec SATA RAID 2820SA
.It
Adaptec SATA RAID 21610SA
.It
Adaptec SCSI RAID 2020ZCR
.It
Adaptec SCSI RAID 2025ZCR
.It
Adaptec SCSI RAID 2120S
.It
Adaptec SCSI RAID 2130S
.It
Adaptec SCSI RAID 2130SLP
.It
Adaptec SCSI RAID 2230SLP
.It
Adaptec SCSI RAID 2200S
.It
Adaptec SCSI RAID 2240S
.It
Adaptec SCSI RAID 3230S
.It
Adaptec SCSI RAID 3240S
.It
Adaptec SCSI RAID 5400S
.It
Dell CERC SATA RAID 2
.It
Dell PERC 2/Si
.It
Dell PERC 2/QC
.It
Dell PERC 3/Si
.It
Dell PERC 3/Di
.It
Dell PERC 320/DC
.It
HP ML110 G2 (Adaptec SATA RAID 2610SA)
.It
HP NetRAID 4M
.It
IBM ServeRAID 8i
.It
IBM ServeRAID 8k
.It
ICP ICP5085BR SAS RAID
.It
ICP ICP9085LI SAS RAID
.It
ICP ICP9047MA SATA RAID
.It
ICP ICP9087MA SATA RAID
.It
ICP ICP9014RO SCSI RAID
.It
ICP ICP9024RO SCSI RAID
.It
Legend S220
.It
Legend S230
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/aacd?" -compact
.It Pa /dev/aac?
aac management interface
.It Pa /dev/aacd?
disk/container interface
.El
.Sh DIAGNOSTICS
Compiling with
.Dv AAC_DEBUG
set to a number between 0 and 2
will enable increasingly verbose debug messages.
.Pp
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.
.Sh SEE ALSO
.Xr kld 4 ,
.Xr linux 4 ,
.Xr scsi 4 ,
.Xr kldload 8 ,
.Xr loader 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 4.3 .
.Sh AUTHORS
.An Mike Smith
.Aq msmith@FreeBSD.org
.An Scott Long
.Aq scottl@FreeBSD.org
.Sh 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.
.Pp
.\"This driver will not work on systems with more than 4GB of memory.
.\".Pp
The controller is not actually paused on suspend/resume.