Re: Boot grub on floppy vs on MBR

[John Summerfield <debian@ComputerDatasafe.com.au>]

Haines Brown wrote:

> I'm running debian sarge and trying to make a grub boot floppy for a
> new cross-installation of sarge from my old disk (sda, sarge,
> kernel 2.4.18-bf2.4) to a new scsi disk added to the scsi bus (sdc,
> sarge, kernel 2.6.7-1). The sdc1 root partition is flagged as
> boot. I'm using reiserfs on both hard disks, but not the floppy.
>
> At this point, I created a grub boot floppy in preparation for
> installing grub on sdc. That floppy boots sda OK, but only leads to a
> kernel panic when I try to boot sdc, even though the floppy stanza 
> is the same as the stanza used to boot sdc from the grub bootloader
> the MBR of sda (except it's hd0 for sda1):
>
>    kernel /vmlinuz ro root=/dev/sdc1
>    root (hd2,0)
>
> Kernel panic: 
>
>    VFS: Cannot open root device "sdc1" or 08:21
>    Please append correct "root=" option
>    Kernel panic: VFS: Unable to mount rootfs on 08:21
>
> Apparently grub can't see /dev/sdc1 even though from sda I can do:  
>  

Yer joking.  How did it get there if grub can't read it?

Better look to see why the kernel doesn't comprehend the partition.




--

Cheers
John

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