Re: How does RAID work with IT8212 RAID PCI card?

From: Alan Cox
Date: Tue Jun 13 2006 - 18:30:12 EST


Ar Maw, 2006-06-13 am 12:01 -0400, ysgrifennodd Lennart Sorensen:
> Congratulations. You have a fake raid card by the sound of it. A
> hardware raid card would have only shown one drive, while a fake raid
> card expects the driver to work with the bios to find out the setup (and
> handle booting), and then the driver does all the raid work in software.

The IT8212 is not a fake raid card - it depends on the firmware whether
you see a drive per raid volume (hardware raid mode) or not (ATAPI
capable firmware). We've found the raid firmware seems quite
temperamental and there is little performance gain from raid 1 in
hardware over software so using md or device mapper is recommended for
that reason.


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