[CentOS-virt] xen CentOS 5.2 domU install error: "Error mounting device xvda1 as /boot"

Jim Trainor jim.trainor at jptrainor.com
Thu Jan 15 03:22:38 UTC 2009

Hello CentOS Xen experts,

  I am attempting my first Xen installation.  I have a Centos 5.2 server 
(dom0) and am attempting to install a Centos 5.2 guest (domU). The 
install goes fine with one exception.  At the end it complains "error 
mounting /boot".  My efforts googling around the net to dig up a 
solution have come up empty, although I've seen similar issues reported. 
Details below. Any suggests would be much appreciated.

  I've read this: http://wiki.centos.org/HowTos/Xen/InstallingCentOSDomU 
but have not yet tried it. However, I would expect the same result, 
since it describes a simple variation of a normal Anaconda install.


* Centos 5.2 installation command, installing Centos 5.2 as the guest OS 
using nfs mounted Centos 5.2 iso dvd image:
    virt-install --paravirt -name vm-1 --ram 512 --file /vm/1/vm-1.img  
--file-size -4 --nographcs --location:nfs:
    I select a minimal server config during the install that I know fits 
in 4 GB.  Not much more than the base packages.

* Last install (Anaconda) screen:
    "Error mounting device xvda1 as /boot: Read-only file system"
    "This most likely means this partition has not been formated."

* Error on reboot after install:
    virDomainCreate() failed POST operation failed: (xend.err "Error 
creating doamain: Boot loader didn't return any data!")

The /etc/xen/vm-1 and /vm/1/vm-1.img files exist as expected after the 
install but will not boot.

Jim Trainor

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