Restoration is the last chance in case of partial or total computer data loss, it should therefore be flawless. The need for restoration can be expressed in according to 3 distinct needs:

• restoration of the full image of a server (Bare Metal Restore)

• to restore a file previously backed-up or archived which was lost or altered

• migrate backed-up or archived data of a system to another system

To meet each of these needs, it is essential to define two precise objectives, namely Recovery Time Objective (RTO) and Recovery Point Objective (RPO).

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