Data is the heart of your company. Hardware and software can be replaced easily, but not the data. Simple data backups are fine for home users, but corporate environments need more. Data needs to be recoverable and available with as little interruption as possible to ongoing operations. Recoverability can be a single server or an entire location.
All companies need a plan in the event corporate data is lost. Protect the data from loss and enable quick recovery from catastrophic systems failure.