1.\" Copyright (c) 2000 Scott Long 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.Dd February 22, 2001 27.Dt AAC 4 28.Os 29.Sh NAME 30.Nm aac 31.Nd Adaptec AdvancedRAID Controller driver 32.Sh SYNOPSIS 33.Cd options AAC_DEBUG=N 34.Cd device pci 35.Cd device aac 36.Cd device aacp 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for the Adaptec AAC family of SCSI Ultra2, Ultra160, 41and Ultra320 RAID controllers. 42Supported controllers include: 43.Bl -bullet 44.It 45AAC-364 46.It 47Adaptec SCSI RAID 2120S 48.It 49Adaptec SCSI RAID 2200S 50.It 51Adaptec SCSI RAID 2410SA 52.It 53Adaptec SCSI RAID 2810SA 54.It 55Adaptec SCSI RAID 5400S 56.It 57Dell CERC SATA RAID 2 58.It 59Dell PERC 2/Si 60.It 61Dell PERC 2/QC 62.It 63Dell PERC 3/Si 64.It 65Dell PERC 3/Di 66.It 67Dell PERC 320/DC 68.It 69HP NetRAID 4M 70.Pp 71.El 72Access to RAID containers is available via the 73.Pa /dev/aacd? 74device nodes. 75Individual drives cannot be accessed 76unless they are part of a container or volume set, 77and non-fixed disks cannot be accessed. 78Containers can be configured by using 79either the on-board BIOS utility of the card, 80or a command-line interface management application. 81.Pp 82The 83.Pa /dev/aac? 84device nodes provide access to the management interface of the controller. 85One node exists per installed card. 86The aliases 87.Pa /dev/afa? 88and 89.Pa /dev/hpn? 90exist for the Dell and HP flavors, respectively, and are required for 91the CLI management utility available from these vendors to work. 92If the kernel is compiled with the 93.Dv COMPAT_LINUX 94option, or the 95.Pa aac_linux.ko 96and 97.Pa linux.ko 98modules are loaded, the 99Linux-compatible 100.Xr ioctl 2 101interface for the management device will be enabled and will allow 102Linux-based management applications to control the card. 103.Pp 104The 105.Nm aacp 106device enables the SCSI pass-thru interface and allows devices connected 107to the card such as cdroms to be available via the CAM 108.Xr scsi 4 109subsystem. 110Note that not all cards allow this interface to be enabled. 111.Ss Tuning 112The read-only sysctl 113.Va hw.aac.iosize_max 114defaults to 65536 and may be set at boot time to another value via 115.Xr loader 8 . 116This value determines the maximum data transfer size allowed 117to/from an array. 118Setting it higher will result in better performance, 119especially for large sequential access patterns. 120.Em Beware : 121internal limitations 122of the card limit this value to 64K for arrays with many members. 123While it may be safe to raise this value, this is done 124.Em at the operator's own risk . 125Note also that 126performance peaks at a value of 96K, 127and drops off dramatically at 128K, 128due to other limitations of the card. 129.Sh FILES 130.Bl -tag -width /boot/kernel/aac.ko -compact 131.It Pa /dev/aac? 132aac management interface 133.It Pa /dev/aacd? 134disk/container interface 135.It Pa /boot/kernel/aac.ko 136aac loadable module 137.El 138.Sh DIAGNOSTICS 139Compiling with 140.Dv AAC_DEBUG 141set to a number between 0 and 3 142will enable increasingly verbose debug messages. 143.Pp 144The adapter can send status and alert messages asynchronously 145to the driver. 146These messages are printed on the system console, 147and are also queued for retrieval by a management application. 148.Sh SEE ALSO 149.Xr kld 4 , 150.Xr linux 4 , 151.Xr scsi 4 , 152.Xr kldload 8 , 153.Xr loader 8 , 154.Xr sysctl 8 155.Sh HISTORY 156The 157.Nm 158driver first appeared in 159.Fx 4.3 . 160.Sh AUTHORS 161.An Mike Smith 162.Aq msmith@FreeBSD.org 163.An Scott Long 164.Aq scottl@FreeBSD.org 165.Sh BUGS 166This driver is not compatible with Dell controllers that have version 1.x 167firmware. 168The firmware version is the same as the kernel version printed in the BIOS 169POST and driver attach messages. 170.Pp 171The controller is not actually paused on suspend/resume. 172.Pp 173