thanks temi for the reply,
about my data centre, all data store on the server, it's not a big network, so there is only one server, i know it's not good, but.....
as i understand from the acronis site, it can be hosted locally, also with it's help i can backup workstations, but it's not the essential, the main thing is to maintain server and if it crashes quickly restore the staff.
any other opinions?