Systems that deal with information or data, whether standalone or distributed, have to plan for disasters and complete system failures. Configuring and setting up backup policies for systems is an integral part of any disaster recovery plan. A backup is a copy of the data in use, which is also sometimes referred to as an archive. In the case of failures leading to data loss, the copy is used to restore data.
Backups, depending on the days of retention, demand vast amount of data storage. However, in the case of data storage media used for backups, the read and write speeds are not of much importance. Organizations procure more reliable storage media and do not worry about the read/write speeds as data from backup storage media is only read from in the case of disasters.