ATARAID(4) | Device Drivers Manual | ATARAID(4) |
ataraid
— software
BIOS RAID
pseudo-device ataraid
ld* at ataraid? vendtype ? unit ?
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:
Status of the logical disk, as well as the disks associated with it, can be viewed through the bioctl(8) utility.
The ataraid
driver first appeared in
NetBSD 2.0.
The ataraid
driver was originally adapted
from FreeBSD by Jason Thorpe
⟨thorpej@NetBSD.org⟩.
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 publicly-available information on these formats is quite limited.
September 16, 2008 | NetBSD 10.99 |