Storage apparatus, management apparatus, and method of controlling storage apparatus

A method of controlling a storage apparatus including:

• a communication interface that receives an I/O request sent from a host apparatus;
• a storage device controller that performs writing and reading of data with respect to a storage device;
• and
• a cache memory that stores data to be written in the storage device or data read from the storage device, the method comprising the steps of:
• providing, at the storage apparatus, a journal volume operated as a volume for which update writing is prohibited and write once is permitted, on the basis of a storage area provided by the storage device;
• and
• providing, at the storage apparatus, a virtual volume as a volume accessible from the host apparatus, the journal volume being an entity of the virtual volume, and the virtual volume being a volume for which an attribute (Read/Add) permitting only reading and write once is settable.