RE: [Xen-users] 3.4-testing : Kernel panic on bootup(mount:couldnotfind filesystem /dev/root/)

["Madhu Venugopal (vmadhu)" <vmadhu@xxxxxxxxx>]

Hi Rob,

I started everything from scratch ... this time with Physical partitions
(without the LVM).

But the result is the same... Kernel panic !

I think am missing some driver as others suggested. But not sure what am
Missing :-(. How can I figure it out ?

-Madhu

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Robert Dunkley
> Sent: Thursday, August 27, 2009 5:37 AM
> To: Robbie Garrett; Madhu Venugopal (vmadhu); Xen User-List
> Subject: RE: [Xen-users] 3.4-testing : Kernel panic on
> bootup(mount:couldnotfind filesystem /dev/root/)
> 
> Hi Robbie,
> 
> 
> I had this exact same problem, tried for 5-10 hours to fix but never
> got
> Xen Dom working with LVM.
> 
> Try installing Centos on a standard partition rather than the default
> LVM scheme, it fixed it for me. You can still use LVM partitions for
> your VMs with this setup.
> 
> 
> Rob
> 
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Robbie
> Garrett
> Sent: 27 August 2009 13:24
> To: 'Madhu Venugopal (vmadhu)'; 'Xen User-List'
> Subject: RE: [Xen-users] 3.4-testing : Kernel panic on bootup
> (mount:couldnotfind filesystem /dev/root/)
> 
> Try the same results with 3.4.1 and not 3.4-testing.
> 
> Lots of people use centos with no issues.
> 
> Below is my grub config for debian 5.0
> 
> title           Xen 3.4.1 / Debian GNU/Linux, kernel 2.6.18.8-xen
> root            (hd2,0)
> kernel          /boot/xen-3.4.1.gz
> module          /boot/vmlinuz-2.6.18.8-xen root=/dev/sdc1 ro
> console=tty0
> max_loop=64 #for some reason this lines raps. It should be just after
> console=tty on the same line.
> module          /boot/initrd.img-2.6.18.8-xen
> 
> -----Original Message-----
> From: Madhu Venugopal (vmadhu) [mailto:vmadhu@xxxxxxxxx]
> Sent: Wednesday, August 26, 2009 3:57 PM
> To: Robbie Garrett; Xen User-List
> Subject: RE: [Xen-users] 3.4-testing : Kernel panic on bootup (mount:
> couldnotfind filesystem /dev/root/)
> 
> Hi,
> 
> I started everything from scratch...
> 
> 1. Installed CentOS 5.3
> 2. Installed XEN 3.4-testing as per README
> 
> The same problem during the reboot. I copied the Grub entry from the
> Native CentOS5.3 installation.
> 
> This time am seeing an error additional error :
> 
> "Volume group : "VolGroup00" not Found"
> 
> Searching the forums, I understand that this is a Logical Volume and
> There are a few problems with Logical Volumes. But none of the
> workarounds
> Seems to work.
> 
> I get a feeling that the "mkinitrd" is not doing its job completely.
> (or) what am I missing ?
> 
> Can someone help me please ?
> 
> -Madhu
> 
> > -----Original Message-----
> > From: Robbie Garrett [mailto:rgarrett@xxxxxxxxxxxxxx]
> > Sent: Wednesday, August 26, 2009 6:11 AM
> > To: Madhu Venugopal (vmadhu); 'Xen User-List'
> > Subject: RE: [Xen-users] 3.4-testing : Kernel panic on bootup
(mount:
> > couldnotfind filesystem /dev/root/)
> >
> > Look at your grub config.
> >
> > Root=/LABEL=/ looks way wrong.
> >
> > It should point to something in the /dev directory.
> >
> > In my case my hard drive that has the / file system on it is
> /dev/sdc1
> >
> > Look at your other grub configs for your other WORKING kernels and
> make
> > the
> > root=/ section of your grub config the same as what those kernels
> read.
> >
> >
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Madhu
> > Venugopal
> > (vmadhu)
> > Sent: Wednesday, August 26, 2009 9:03 AM
> > To: Xen User-List
> > Subject: RE: [Xen-users] 3.4-testing : Kernel panic on bootup
(mount:
> > couldnotfind filesystem /dev/root/)
> >
> > Anyone ?
> > I searched the forums, but couldn't find a solution to the problem
am
> > facing.
> >
> > -Madhu
> >
> > > -----Original Message-----
> > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> > > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Madhu Venugopal (vmadhu)
> > > Sent: Tuesday, August 25, 2009 3:43 PM
> > > To: Xen User-List
> > > Subject: [Xen-users] 3.4-testing : Kernel panic on bootup (mount:
> > could
> > > notfind filesystem /dev/root/)
> > >
> > > Hi,
> > >
> > > I installed XEN 3.4-testing version without much problems in
CentOS
> > 5.3
> > > running on quadcore Intel Nahelam processors using the following
> > > installation
> > > steps (as in the README) :
> > >
> > > <steps>
> > > hg clone http://xenbits.xensource.com/xen-3.4-testing.hg`
> > > cd xen-unstable.hg
> > > make world
> > > make install
> > > make linux-2.6-xen-config CONFIGMODE=menuconfig
> > > make linux-2.6-xen-build
> > > make linux-2.6-xen-install
> > > depmod 2.6.18.8-xen
> > > mkinitrd -v -f --with=ahci --with=sd_mod --with=scsi_mod --allow-
> > > missing
> > > initrd-2.6.18-xen.img 2.6.18.8-xen
> > > cp initrd-2.6.18-xen.img /boot
> > > </steps>
> > >
> > > After the installation, I updated the grub with the following
entry
> :
> > >
> > > <grub.conf>
> > > title  Xen 3.4.2
> > >         root (hd0,0)
> > >         kernel /xen.gz loglvl=all guest_loglvl=all vtd=1 iommu=1
> > >         module /vmlinuz-2.6.18.8-xen root=LABEL=/ apic=debug
> > maxcpus=8
> > >         module /initrd-2.6.18-xen.img
> > > <grub.conf>
> > > But during the bootup, I see Kernel panic with the only error
above
> > > that
> > > being :
> > >
> > > <error>
> > > mount: could not find filesystem /dev/root/
> > > setuproot: moving /dev failed: No such file or Directory
> > > no fstub.sys, mounting internal defaults
> > > setuproot: error mounting /proc:No such file or directory
> > > </error>
> > >
> > > Is it an error in partition ? or a Grub entry error ?
> > > Or an installation error ?
> > >
> > > Can someone help me ?
> > >
> > > Thanks,
> > > Madhu
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
> >
> 
> 
> 
> 
> 
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