The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
Jan. 18, 2013
Hitachi, Ltd., Tokyo, JP;
Yuki Nikaido, Tokyo, JP;
Masaaki Hosouchi, Tokyo, JP;
Taiki Miyaji, Tokyo, JP;
Takashi Nagao, Tokyo, JP;
Takeyuki Imadu, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage apparatus has a tiered pool including a plurality of storage tiers formed by a plurality of real page groups having different input/output performance and provides a virtual volume to which a storage area is allocated by a real page unit. At a time point before new data to be written to the virtual volume occurs based on a data object, if a real page is allocated to a write destination virtual page which is a write destination of the new data, a host computer transmits a change command to change the real page allocated to the write destination virtual page to a real page in a storage tier having predetermined performance to the storage apparatus. The storage apparatus changes the real page allocated to the write destination virtual page to a real page in the storage tier having the predetermined performance according to the change command.