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:
Feb. 19, 2019
Filed:
Nov. 18, 2014
Hitachi, Ltd., Tokyo, JP;
Masamitsu Takahashi, Tokyo, JP;
Yutaka Takata, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When the storage system according to the present invention receives a request for writing new data to a first logical volume after having received a first pair creating request, the storage system stores the new data in a cache memory. Then when the storage system subsequently receives a second pair creating request, even if the cache memory still has stored therein the data identical to the data that was stored on the first logical volume at the point in time when the storage system received the first pair formation request, and even if this identical data has not yet been copied to the second logical volume, the storage system omits to copy this identical data to the second logical volume.