Booting from firmware RAID

Ilya Kazakevich kazakevichilya at
Wed Mar 16 13:25:56 UTC 2011

Thank you.

I configured boot0 to my ar0 and tried to boot from it. It freezes.
I use RAID10 and Intel-ICH7.

Looks like I've faced with some other troubles..


On Wed, Mar 16, 2011 at 4:05 PM, mcoyles
<mcoyles at>wrote:

> >This is probably more PC-specific than freebsd-specific question. I have
> >intel firmware raid. OS needs drivers to work with it. FreeBSD sees it as
> >ar0, so it has drivers.
> >But I want my OS to be installed on this drive and boot from it. It is not
> >good idea, but I really want to do it:)
> >Is it possible?
> >
> >boot0 and boot1 both work with HDD via BIOS interrupts and CHS, right? So,
> >how do they know how to access RAID? They has no drivers.
> >Or BIOS supports interrupts to access RAID with out of drivers? If so --
> >what for drivers are needed? To access drive via ATA interface?
> Bios support interrupts and can thus boot from firmware raid.
> Under windows drivers typically just give you full speed / management
> features
> -----
> Marci

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