STORAGE CONTROL APPARATUS, DATA ARCHIVE METHOD FOR STORAGE CONTROL APPARATUS, AND STORAGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a storage control apparatus, efficiently migrating data stored in a virtual volume from a random access-type storage device to a sequential access-type storage device. SOLUTION: The virtual volume 6 is constituted by a plurality of pages. Each page is associated with either a segment of a disk device 7 or a segment of a tape device 8. Data which have not been accessed by the host 2 are collected in page units in a spare disk device 7(3) for data migration. The data are copied from the migration source disk device 7(3) to the migration destination tape device 8. The segment assignment destination of the page of the virtual volume is changed from a segment in the disk device to a segment in the tape device. COPYRIGHT: (C)2009,JPO&INPIT