[gentoo-user] Re: How does grub assemble a RAID1 for / ??

[Kerin Millar]

On 04/04/2010 02:01, Mark Knecht wrote:
> Tried changing root=/dev/md0. No change.
>
> The actual failure message is the fairly standard
>
> VFS - Unable to mount root fs on unknown-block(9,0)

[snip]

> CONFIG_MD_RAID1=y

That's all that needs to be enabled within the RAID section of the 
kernel. However, all the other options that would normally be required 
to boot must also be compiled in statically for things to work as 
expected (ATA/SCSI controller driver, filesystem of choice, 
CONFIG_BLK_DEV_SD and so forth). It seems that you may have overlooked 
something. However, it's impossible to determine whether that's the case 
based on the information presented thus far.

I would suggest that you double-check your .config in full, or present 
it here for review, along with the output of lspci -nn.

Cheers,

--Kerin