NAME
ataraid
- software BIOS RAID
SYNOPSIS
pseudo-device ataraid
ld* at ataraid? vendtype ? unit ?
DESCRIPTION
The
ataraid
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.
The driver currently supports RAID formats from:
-
Adaptec HostRAID (found in Intel 6300ESB)
-
Intel MatrixRAID
-
JMicron RAID
-
nVidia MediaShield
-
Promise FastTrak
-
Via V-RAID (found in many VIA-based motherboards)
Status of the logical disk as well as the disks associated with it,
can be viewed through the
bioctl(8)
utility.
SEE ALSO
ld(4),
bioctl(8)
HISTORY
The
ataraid
driver first appeared in
NetBSD2.0.
AUTHORS
The
ataraid
driver was originally adapted from
FreeBSD
by
Jason Thorpe
<thorpej@NetBSD.org>.
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
``building''
state, and it does not do the right thing.
At least part of the reason for this is that the publically-available
information on these formats is quite limited.