[ovirt-users] self hosted storage engine disaster recovery procedure

[Ron V.]

Hello,

I am getting familiar with oVirt and using the self-hosted engine on an 
iSCSI SAN and so far everything seems quite impressive.

I am trying to document a disaster recovery mecanism using a full OS 
backup as well as a engine backup as described at 
http://www.ovirt.org/Ovirt-engine-backup

I am unclear however how to prepare the existing iSCSI LUN to receive 
the data restore.  I am able to destroy the engine and the VMs continue 
to run, however I am unclear how I can free the host lock on that LUN, 
format it and re-install on it.  Is there a howto/document I can refer 
to in order to do this?

I am looking for info as to how I can re-install a functional engine 
from a backup in the case of data-corruption or any other disaster that 
could happen on the iSCSI LUN set aside for the engine, and a means to 
re-install on that LUN should the need be, without having to power down 
the VMs or worse, power everything down and re-install everything from 
scratch.  How can I boot a CentOS install disk and have the previous's 
engine LUN as a install target, and then boot that installed OS to 
restore the engine backup data?

Thanks in advance,

Ron