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. Note that not all cards allow this interface to be enabled. 102.Ss Tuning 103The read-only sysctl 104.Va hw.aac.iosize_max 105defaults to 65536 and may be set at boot time to another value via 106.Xr loader 8 . 107This value determines the maximum data transfer size allowed 108to/from an array. 109Setting it higher will result in better performance, 110especially for large sequential access patterns. 111.Em Beware : 112internal limitations 113of the card limit this value to 64K for arrays with many members. 114While it may be safe to raise this value, this is done 115.Em at the operator's own risk . 116Note also that 117performance peaks at a value of 96K, 118and drops off dramatically at 128K, 119due to other limitations of the card. 120.Sh FILES 121.Bl -tag -width /boot/kernel/aac.ko -compact 122.It Pa /dev/aac? 123aac management interface 124.It Pa /dev/aacd? 125disk/container interface 126.It Pa /boot/kernel/aac.ko 127aac loadable module 128.El 129.Sh DIAGNOSTICS 130Compiling with 131.Dv AAC_DEBUG 132set to a number between 0 and 3 133will enable increasingly verbose debug messages. 134.Pp 135The adapter can send status and alert messages asynchronously 136to the driver. 137These messages are printed on the system console, 138and are also queued for retrieval by a management application. 139.Sh SEE ALSO 140.Xr kld 4 , 141.Xr linux 4 , 142.Xr scsi 4 , 143.Xr kldload 8 , 144.Xr loader 8 , 145.Xr sysctl 8 146.Sh HISTORY 147The 148.Nm 149driver first appeared in 150.Fx 4.3 . 151.Sh AUTHORS 152.An Mike Smith 153.Aq msmith@FreeBSD.org 154.An Scott Long 155.Aq scottl@FreeBSD.org 156.Sh BUGS 157This driver is not compatible with Dell controllers that have version 1.x 158firmware. 159The firmware version is the same as the kernel version printed in the BIOS 160POST and driver attach messages. 161.Pp 162The controller is not actually paused on suspend/resume. 163.Pp 164