VFS: Cannot open root device ...

VFS: Cannot open root device ...

[Chris Dumoulin]

I'm trying to port a 2.6 kernel to a V2Pro-based board that I've got. I 
get the following output when trying to boot:

RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem).
VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(0,0)

I'm trying to use an initrd RAMDISK, and I've made sure that RAMDISK and 
initrd support are both enabled in the kernel configuration. Any ideas 
would be appreciated.

Cheers,
Chris Dumoulin
-- 
*--Christopher Dumoulin--*
Software Team Leader

<http://ics-ltd.com/>
<http://ics-ltd.com/>

Interactive Circuits and Systems Ltd.
5430 Canotek Road
Ottawa, ON
K1J 9G2
(613)749-9241
1-800-267-9794 (USA only)

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Re: VFS: Cannot open root device ...

[Steve Iribarne (GMail)]

On 6/8/06, Chris Dumoulin <cdumoulin@ics-ltd.com> wrote:
> I'm trying to port a 2.6 kernel to a V2Pro-based board that I've got. I
> get the following output when trying to boot:
>
> RAMDISK: Compressed image found at block 0
> VFS: Mounted root (ext2 filesystem).
> VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
> Please append a correct "root=" boot option
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(0,0)

What boot loader are you using?  In the boot loader where does it
think the root fs is located?  My guess is /dev/ram0 or something like
that?

So I'd check your ramdisk to see that it has a /dev/ram0.
Make sure you have rights to it.

-stv
>
> I'm trying to use an initrd RAMDISK, and I've made sure that RAMDISK and
> initrd support are both enabled in the kernel configuration. Any ideas
> would be appreciated.
>
> Cheers,
> Chris Dumoulin
> --
> *--Christopher Dumoulin--*
> Software Team Leader
>
> <http://ics-ltd.com/>
> <http://ics-ltd.com/>
>
> Interactive Circuits and Systems Ltd.
> 5430 Canotek Road
> Ottawa, ON
> K1J 9G2
> (613)749-9241
> 1-800-267-9794 (USA only)
>
> ------------------------------------------------------------------------
> This e-mail is private and confidential and is for the addressee only.
> If misdirected, please notify us by telephone and confirm that it has
> been deleted from your system and any hard copies destroyed. You are
> strictly prohibited from using, printing, distributing or disseminating
> it or any information contained in it save to the intended recipient.
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