Re: [gentoo-user] Cannot open root device "sda3" or unknown-block (0,0)

[Joseph <syscon780@gmail.com>]

On 11/16/10 21:45, Dale wrote:

[snip]
>> The BIOS sees both HD but, boot sector is working OK as grub comes up
>> but then I get a message:
>>
>> VFS: Cannot open root device "sda3" or unknown-block (0,0)
>> please append a correct "root=" boot option; here are the available
>> partitions:
>> 0300  4191302 hda driver: ide-cdrom
>>
>> So it seems kernel does not see the sata drives, but how it is
>> possible? Boot partition is on sda
>>
>> Someone suggested that BIOS is seeing different logical layout of
>> cylinders/ heads.
>> In BIOS setup there a choice of IDE mode, AHCI mode, etc
>
>It sounds to me like you don't have the drivers for the chipset.  If you
>leave those out or they are modules, it can't see the drives.
>
>Keep in mind, just because grub sees the drives does not mean the kernel
>does.  They are two separate things.  Grub only passes info on to the
>kernel.  Once you select what you want to boot, grub is out of the picture.
>
>Dale
>
>:-)  :-)

Thanks for the hint.
What should I look for? 
I think "lspci" list some chipset, MCP51 but kernel is not listing anything on MCP51

-- 
Joseph