1.\" $NetBSD: ataraid.4,v 1.15 2013/08/06 17:33:29 snj Exp $ 2.\" 3.\" Copyright (c) 2005 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Allen K. Briggs. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd September 16, 2008 31.Dt ATARAID 4 32.Os 33.Sh NAME 34.Nm ataraid 35.Nd software BIOS RAID 36.Sh SYNOPSIS 37.Cd "pseudo-device ataraid" 38.Cd "ld* at ataraid? vendtype ? unit ?" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for BIOS-based software RAID controllers. 43These are devices which have some simple support for several basic 44RAID levels (often RAID 0 and RAID 1), but which require software 45support to actually perform the RAID function. 46The BIOS support is largely just to create and recognize the array 47so that it may be a boot device. 48.Pp 49The driver currently supports RAID formats from: 50.Bl -bullet -offset indent -compact 51.It 52Adaptec HostRAID (found in Intel 6300ESB) 53.It 54Intel MatrixRAID 55.It 56JMicron RAID 57.It 58nVidia MediaShield 59.It 60Promise FastTrak 61.It 62Via V-RAID (found in many VIA-based motherboards) 63.El 64.Pp 65Status of the logical disk, as well as the disks associated with it, 66can be viewed through the 67.Xr bioctl 8 68utility. 69.Sh SEE ALSO 70.Xr ld 4 , 71.Xr bioctl 8 72.Sh HISTORY 73The 74.Nm 75driver first appeared in 76.Nx 2.0 . 77.Sh AUTHORS 78The 79.Nm 80driver was originally adapted from 81.Fx 82by 83.An Jason Thorpe 84.Aq thorpej@NetBSD.org . 85.Sh BUGS 86Not all features of the software RAID are currently recognized or 87supported. 88For example, the Adaptec support doesn't recognize when a RAID 1 89should be in a 90.Dq building 91state, and it does not do the right thing. 92.Pp 93At least part of the reason for this is that the publicly-available 94information on these formats is quite limited. 95