Computer system and data erasing method

摘要

Provided is a computer system for identifying all physical resources which have been allocated to logical units before to be subject to shredding and for performing shredding on the identified physical resources. All the physical resources related to the physical resources specified by a user to be subject to data erasing are selected using usage history for the storage system. Moreover, a shredding task for the selected physical resources is generated according to configuration information of the storage system and shredding is performed based on the generated task. Consequently, the data is completely erased.