> 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? > > Is it possible to boot freebsd from "firmware raid"?
Sometimes: it depends on the firmware, and your bios. I had a add-in PCIe SATA RAID controller based on a Marvell SE9128 chipset, and using a Marvell firmware. The bios and the FreeBSD 9-CURRENT bootloader were able to boot from a JBOD drive attached to the controller, up until the point where the ahci driver tried to take control of the drive. Then the Marvell firmware presented a fictitious configuration to the ahci driver and returned invalid device signatures, so the boot process failed. On the same machine, however, I was able to boot without problems from a JBOD drive attached to a PCI-X SATA RAID controller based on the Silicon Image SiI3124 chipset, using a Silicon Image firmware. b. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
