Re: [RFC] Multi-path IO in 2.5/2.6 ?

[Alan Cox]

On Tue, 2002-09-10 at 15:06, Cameron, Steve wrote:
> We can use the md driver for this.  However, we cannot boot from
> such a multipath device.  Lilo and grub do not understand md multipath
> devices, nor do anaconda or other installers.  (Enhancing all of those,
> I'd like to avoid.  Cramming multipath i/o into the low level driver
> would accomplish that, but, too yucky.) 
> 
> If there is work going on to enhance the multipath support in linux
> it would be nice if you could boot from and install to such devices.

Booting from them is a BIOS matter. If the BIOS can do the block loads
off the multipath device we can do the rest. The probe stuff can be done
in the boot initrd - as some vendors handle raid for example.