1.\" $NetBSD: ataraid.4,v 1.6 2008/04/30 13:10:53 martin 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 April 5, 2007 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.Sh DESCRIPTION 39The 40.Nm 41driver provides support for BIOS-based software RAID controllers. 42These are devices which have some simple support for several basic 43RAID levels (often RAID 0 and RAID 1), but which require software 44support to actually perform the RAID function. 45The BIOS support is largely just to create and recognize the array 46so that it may be a boot device. 47.Pp 48The driver currently supports RAID formats from: 49.Bl -bullet -offset indent -compact 50.It 51Promise FastTrak 52.It 53Adaptec HostRAID (found in Intel 6300ESB) 54.It 55Via V-RAID (found in many VIA-based motherboards) 56.El 57.Sh SEE ALSO 58.Xr ld 4 59.Sh HISTORY 60The 61.Nm 62driver first appeared in 63.Nx 2.0 . 64.Sh AUTHORS 65The 66.Nm 67driver was originally adapted from 68.Fx 69by 70.An Jason Thorpe 71.Aq thorpej@NetBSD.org . 72.Sh BUGS 73Not all features of the software RAID are currently recognized or 74supported. 75For example, the Adaptec support doesn't recognize when a RAID 1 76should be in a 77.Dq building 78state, and it does not do the right thing. 79.Pp 80At least part of the reason for this is that the publically-available 81information on these formats is quite limited. 82