Provided is a storage apparatus 10 including a communication I/F 11, a control processor 12, a drive controller 13, and a cache memory 14, which manages a drive write request to write data to a storage drive 171 in a write process wait queue 1500, reads the drive write request registered on the write process wait queue 1500, and writes the data to the storage drive 171 in accordance with the drive write request read from the write process wait queue 1500. The storage apparatus 10 includes the functions of: generating erase data as data to be written in order to shred the storage drive 171, and storing the generated erase data in the cache memory 14; and generating a plurality of erase data write requests to write the erase data, intended for the different storage drives 171, respectively, and registering the generated erase data write requests into the write process wait queue 1500.