The reinstallation on your server has failed.
This is due to a problem of CentOS, causing the following
error : 'Error during copy: ERROR 1 while installing grub
on /dev/sda'

The drive /sda has been replaced twice and the installation

tried more than 20 times.
Maybe you should consider trying another Operating System.

The server is started in Rescue-PRO mode, rescue mode
accessible, ping OK. Access codes have been sent.