An inexpensive storage system is disclosed along with methods of managing
such a system. In one preferred embodiment, the system includes a high
performance high reliability storage medium configured for initial
storage of data, a low performance high reliability storage medium
configured for backup of data initially stored on the high performance
high reliability storage medium, and a high performance low reliability
storage medium, configured to receive data transferred from the high
performance high reliability storage medium, after the data has been
backed up on the low performance high reliability storage medium. This
significantly reduces the cost of the system without substantially
comprising performance. Reliability is likewise maintained owing to the
high reliability backup.