Re: can't boot due to root device problem

[Christoph Plattner]

You have the problem, that you try to load the SCSI module,
but this is not possible, as you cannot load modules, because
the root file system is not mounted (this is the error message).
On the other hand, you cannot mount the ROOT fs, as you cannot
load the SCSI module !!!

So you can solve this in two ways:

1) compile in the SCSI fix into the kernel (not as module)
        (my preferred solution, as you can add and remove
        single SCSI device although it is compile id)

2) keep SCSI as module, but then you need an initrd.img RAM
        disk includeing the SCSI modules. For this job booting
        from SCSI some (or all, I don;t know) have ready tools
        to create such a working RAM disk.
        On GRUB you need an additional line:

        initrd /boot/initrd.img 

        or something like that.

And see the other reply you have concerning the partition /boot.
Under this partition, everything is flat, or you use
/boot/boot/vmlinuz, etc, ....., for GRUB /boot/boot/grub/menu.lst
is mandatory on this position.

With friendly regards
        Christoph P.




Bob Berman wrote:
> 
> I installed a new SCSI hard disk in my system and installed
> SuSe 7.2 on it. I am trying to use GRUB to boot this system
> but it is not working and I can not understand why not.
> 
> I have a SCSI disk - id 0 - sda - already in the box that has
> Linux on it. I have installed LILO in the MBR and this boots
> fine.
> 
> My new SCSI disk is id 1 - sdb - and this is the partitioning:
> /dev/sdb1 - /boot (ext2fs)
> /dev/sdb2 - swap
> /dev/sdb3 - / (ext2fs)
> /dev/sdb4 - LVM partition (/opt /home /var)
> 
> I try to boot it with the
> following commands:
> 
> root (hd1,0)
> kernel /boot/vmlinuz root=/dev/sdb3
> boot
> 
> When I boot Linux, the error I get is:
> 
> request_module[block major-8]: root fs not mounted
> VFS: Cannot open root device "sbd3" or 08:13
> Please append a correct "root=" boot option
> Kernel panic: VFS: Unable to mount root fs on 08:13
> 
> I am absolutely sure that my root partition is /dev/sdb3.
> What is going on and how can I get it to work?
> I am using grub 0.90, by the way.
> 
> Thanks!
> 
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