problem in creating virtual machines on XEN

[onkarkk]

Hi,
I have Installed centos 5.3 and enabled virtualization on it.

now i want to create virtual mechine , while trying this im getting following errors :

i have used virt-install command then

it has asked some questions and i have answered them of what ram , location e.t.c .. after that a warning came reagarding partition , then an error came like :

: input / output error during read on /dev/xvda

i have ignored this error and continued installation

at last i have got an error:

like

LVM operation failed : vgcreate failed for volgroup00 , the installer will now exit.

Please guide me where im doing mistake ...

regards
Krish