STORAGE DEVICE AND LOGICAL VOLUME MIGRATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a storage device capable of preventing performance from lowering.

SOLUTION: The storage device having a logical volume defined in a storage area provided by one or more hard disk drive is provided with: a first logical volume migration part for migrating the logical volume of a first storage area targeted for power supply shutdown to a second storage area that is not targeted for power supply shutdown; and a second logical volume migration part for migrating an expiration date-defined logical volume from the second storage area to a third storage area of a post-expiration migration destination when the expiration date of the expiration date-defined logical volume set with an expiration date for migrating the logical volume set is reached. The first logical volume migration part balances and migrates the expiration date-defined logical volume to the second storage area by referring to the expiration date of the expiration date-defined logical volume and taking timing of migration to the third storage area into consideration.

COPYRIGHT: (C)2009,JPO&INPIT