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 5400S 52.It 53HP NetRAID 4M 54.It 55Dell PERC 2/Si 56.It 57Dell PERC 2/QC 58.It 59Dell PERC 3/Si 60.It 61Dell PERC 3/Di 62.Pp 63.El 64Access to RAID containers is available via the 65.Pa /dev/aacd? 66device nodes. 67Individual drives cannot be accessed 68unless they are part of a container or volume set, 69and non-fixed disks cannot be accessed. 70Containers can be configured by using 71either the on-board BIOS utility of the card, 72or a command-line interface management application. 73.Pp 74The 75.Pa /dev/aac? 76device nodes provide access to the management interface of the controller. 77One node exists per installed card. 78The aliases 79.Pa /dev/afa? 80and 81.Pa /dev/hpn? 82exist for the Dell and HP flavors, respectively, and are required for 83the CLI management utility available from these vendors to work. 84If the kernel is compiled with the 85.Dv COMPAT_LINUX 86option, or the 87.Pa aac_linux.ko 88and 89.Pa linux.ko 90modules are loaded, the 91Linux-compatible 92.Xr ioctl 2 93interface for the management device will be enabled and will allow 94Linux-based management applications to control the card. 95.Pp 96The 97.Nm aacp 98device enables the SCSI pass-thru interface and allows devices connected 99to the card such as cdroms to be available via the CAM 100.Xr scsi 4 101subsystem. 102Note that not all cards allow this interface to be enabled. 103.Ss Tuning 104The read-only sysctl 105.Va hw.aac.iosize_max 106defaults to 65536 and may be set at boot time to another value via 107.Xr loader 8 . 108This value determines the maximum data transfer size allowed 109to/from an array. 110Setting it higher will result in better performance, 111especially for large sequential access patterns. 112.Em Beware : 113internal limitations 114of the card limit this value to 64K for arrays with many members. 115While it may be safe to raise this value, this is done 116.Em at the operator's own risk . 117Note also that 118performance peaks at a value of 96K, 119and drops off dramatically at 128K, 120due to other limitations of the card. 121.Sh FILES 122.Bl -tag -width /boot/kernel/aac.ko -compact 123.It Pa /dev/aac? 124aac management interface 125.It Pa /dev/aacd? 126disk/container interface 127.It Pa /boot/kernel/aac.ko 128aac loadable module 129.El 130.Sh DIAGNOSTICS 131Compiling with 132.Dv AAC_DEBUG 133set to a number between 0 and 3 134will enable increasingly verbose debug messages. 135.Pp 136The adapter can send status and alert messages asynchronously 137to the driver. 138These messages are printed on the system console, 139and are also queued for retrieval by a management application. 140.Sh SEE ALSO 141.Xr kld 4 , 142.Xr linux 4 , 143.Xr scsi 4 , 144.Xr kldload 8 , 145.Xr loader 8 , 146.Xr sysctl 8 147.Sh HISTORY 148The 149.Nm 150driver first appeared in 151.Fx 4.3 . 152.Sh AUTHORS 153.An Mike Smith 154.Aq msmith@FreeBSD.org 155.An Scott Long 156.Aq scottl@FreeBSD.org 157.Sh BUGS 158This driver is not compatible with Dell controllers that have version 1.x 159firmware. 160The firmware version is the same as the kernel version printed in the BIOS 161POST and driver attach messages. 162.Pp 163The controller is not actually paused on suspend/resume. 164.Pp 165