cannt open root device ?

cannt open root device ?

[Bo Yang]

Hello everybody :
I know maybe my question is just a piece of cake for you , but
I have struggled with it for 4 days , and I didn't get any answer from
the google and the archive .
So I came here !

And my problem is that :
I use VMware , and install gentoo linux on the vm which hold a scsi disk
. I compile the linux kernel with scsi support in the kernel self , but
when boot up the kernel panic with the bellow message :
VFS: Cannot open root device "803" or unkonw-block(8,3)
Please append a correct "root=" boot option

But I have a line in my lilo.conf : root=/dev/sda3

I have recompile the kernel for many times , but it panic everytime .

Thanks in advance !

Best Regard !




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Re: cannt open root device ?

[James Miller]

On Fri, 31 Mar 2006, Bo Yang wrote:

> I know maybe my question is just a piece of cake for you , but
> I have struggled with it for 4 days , and I didn't get any answer from
> the google and the archive .
> So I came here !
>
> And my problem is that :
> I use VMware , and install gentoo linux on the vm which hold a scsi disk
> . I compile the linux kernel with scsi support in the kernel self , but
> when boot up the kernel panic with the bellow message :
> VFS: Cannot open root device "803" or unkonw-block(8,3)
> Please append a correct "root=" boot option
>
> But I have a line in my lilo.conf : root=/dev/sda3
>
> I have recompile the kernel for many times , but it panic everytime .

This is actually a VMware question more than a Linux question.  They have 
a user forum: have you tried posting about your problem there?  I have a 
little bit of experience with VMware, but you don't provide enough 
information for me to take a stab at what the problem might be.  First, is 
this a virtual disk or are you trying to use an actual scsi hardware disk 
for your Gentoo install?  I have no expereince with using a real disk or 
partition for the guest OS, only with virtual disks.  So I might not be 
able to help with that anyway.  If it's a virtual partition I can't 
understand why you would specify it as /dev/sda3.  I've always put OS's on 
the first partition of the virtual disk.  VMware presents these virtual 
disks to the host OS as scsi disks, so my experience has always been with 
systems installed to /dev/sda1.  Did you partition the (virtual?) disk and 
put /home and swap or something on the other 2 partitions?  Anyway, I'm 
not even sure I can help.  Probably best to try the VMware forums.

James
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Re: cannt open root device ?

[Bo Yang]

> This is actually a VMware question more than a Linux question.  They 
> have a user forum: have you tried posting about your problem there?  I 
> have a little bit of experience with VMware, but you don't provide 
> enough information for me to take a stab at what the problem might 
> be.  First, is this a virtual disk or are you trying to use an actual 
> scsi hardware disk for your Gentoo install?  I have no expereince with 
> using a real disk or partition for the guest OS, only with virtual disks.
It is a scsi virtual disk ,  and VM  display it as '' Hard Disk 1: 
(SCSI  0:0)"
> So I might not be able to help with that anyway.  If it's a virtual 
> partition I can't understand why you would specify it as /dev/sda3.  
> I've always put OS's on the first partition of the virtual disk.  
> VMware presents these virtual disks to the host OS as scsi disks, so 
> my experience has always been with systems installed to /dev/sda1.  
> Did you partition the (virtual?) disk and put /home and swap or 
> something on the other 2 partitions?  Anyway, I'm not even sure I can 
> help.  Probably best to try the VMware forums.
And I have partition the disk for 4 part .
/dev/sda1  /boot  reiserfs
/dev/sda2  swap  swap
/dev/sda3  /          reiserfs
/dev/sda4  /usr    reiserfs

So I tell the lilo to mount the root file system in the partition 
/dev/sda3 , is it wrong ?

Thank you for your reply !
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Re: cannt open root device ?

[Juanjo Escribano]

Hi,

	I'm not sure but maby you don't have the correct modules to manage the
disk emulated by VMware in the initrd. I have a FC4 installed on a
vmware machine with SCSI disk and I need that initrd loads this modules
to wark fine: scsi_mod, sd_mod, mptbase, mptscsih, mptspi. Without this
modules the kernel can't manage the disk and it can't create the root
device to do the switchroot.

	I hope it can help you.

Good Luck!!

Juanjo



El vie, 31-03-2006 a las 13:50 +0800, Bo Yang escribió:
> > This is actually a VMware question more than a Linux question.  They 
> > have a user forum: have you tried posting about your problem there?  I 
> > have a little bit of experience with VMware, but you don't provide 
> > enough information for me to take a stab at what the problem might 
> > be.  First, is this a virtual disk or are you trying to use an actual 
> > scsi hardware disk for your Gentoo install?  I have no expereince with 
> > using a real disk or partition for the guest OS, only with virtual disks.
> It is a scsi virtual disk ,  and VM  display it as '' Hard Disk 1: 
> (SCSI  0:0)"
> > So I might not be able to help with that anyway.  If it's a virtual 
> > partition I can't understand why you would specify it as /dev/sda3.  
> > I've always put OS's on the first partition of the virtual disk.  
> > VMware presents these virtual disks to the host OS as scsi disks, so 
> > my experience has always been with systems installed to /dev/sda1.  
> > Did you partition the (virtual?) disk and put /home and swap or 
> > something on the other 2 partitions?  Anyway, I'm not even sure I can 
> > help.  Probably best to try the VMware forums.
> And I have partition the disk for 4 part .
> /dev/sda1  /boot  reiserfs
> /dev/sda2  swap  swap
> /dev/sda3  /          reiserfs
> /dev/sda4  /usr    reiserfs
> 
> So I tell the lilo to mount the root file system in the partition 
> /dev/sda3 , is it wrong ?
> 
> Thank you for your reply !
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Re: cannt open root device ?

[David Fierbaugh]

I would second what's been said about the VM ware forums, and add that the 
Gentoo Forums might also provide more relevant help to the Gentoo specific 
items. Also here's an article on Gentoo & VM ware:
http://www.linuxdig.com/news_page/1082673701.php

-- David

On Thursday 30 March 2006 21:48, Bo Yang wrote:
> Hello everybody :
> I know maybe my question is just a piece of cake for you , but
> I have struggled with it for 4 days , and I didn't get any answer from
> the google and the archive .
> So I came here !
>
> And my problem is that :
> I use VMware , and install gentoo linux on the vm which hold a scsi disk
> . I compile the linux kernel with scsi support in the kernel self , but
> when boot up the kernel panic with the bellow message :
> VFS: Cannot open root device "803" or unkonw-block(8,3)
> Please append a correct "root=" boot option
>
> But I have a line in my lilo.conf : root=/dev/sda3
>
> I have recompile the kernel for many times , but it panic everytime .
>
> Thanks in advance !
>
> Best Regard !
>
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
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