.\"	$NetBSD: ataraid.4,v 1.4 2006/09/23 01:12:41 elad Exp $
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.\" by Allen K. Briggs.
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.Dd September 23, 2006
.Dt ATARAID 4
.Os
.Sh NAME
.Nm ataraid
.Nd software BIOS RAID
.Sh SYNOPSIS
.Cd "pseudo-device ataraid"
.Sh DESCRIPTION
The
.Nm
driver provides support for BIOS-based software RAID controllers.
These are devices which have some simple support for several basic
RAID levels (often RAID 0 and RAID 1), but which require software
support to actually perform the RAID function.
The BIOS support is largely just to create and recognize the array
so that it may be a boot device.
.Pp
The driver currently supports RAID formats from:
.Bl -bullet -offset indent -compact
.It
Promise FastTrak
.It
Adaptec HostRAID (found in Intel 6300ESB)
.El
.Sh SEE ALSO
.Xr ld 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 2.0 .
.Sh AUTHORS
The
.Nm
driver was originally adapted from
.Fx
by
.An Jason Thorpe
.Aq thorpej@NetBSD.org .
.Sh BUGS
Not all features of the software RAID are currently recognized or
supported.
For example, the Adaptec support doesn't recognize when a RAID 1
should be in a
.Dq building
state, and it does not do the right thing.
.Pp
At least part of the reason for this is that the publically-available
information on these formats is quite limited.