Because one size doesn't always fit all 

Today, a corporation's data may be the most important possession it has. The IT decision drivers are changing; information is the business and is your vital competitive and operational asset. Protecting that data is the most significant thing the company can do. When companies are prepared to migrate their data and applications, they need it to happen as efficiently as possible, with reduced downtime and with as little business disruption as possible. This is especially true when you are considering moving large amounts of data or important applications. Data migration can be a hazardous and time-consuming task. There is always the potential for data loss and reduced productivity as end users are affected.