OK, Thank you for all.
But do you know if exist a docu/procedure for my case: Live system is a two node MSCS with CI and DI on same MSCS node. We would to setup a new server with mirrored or log-shipped MSSQL but also the CI... so when MSCS system will crashed we ca use new server... also with manual manual intervention. It is reasonable for us to wait even a two hours.
Into SAP note there is db-only procedure but nothing to re-instal the SAP istance.
Thank you.