Storage system and storage control method

US8935488B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8935488-B2
Application numberUS-201213390015-A
CountryUS
Kind codeB2
Filing dateJan 26, 2012
Priority dateJan 26, 2012
Publication dateJan 13, 2015
Grant dateJan 13, 2015

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  2. Abstract

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  5. First independent claim

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Abstract

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A storage system is provided with storage devices that are basis of a pool and a primary volume and a controller that is coupled to the plurality of storage devices and a host computer and that is provided with a cache region. In a case that a write request specifies a secondary volume storing a snapshot of a primary volume the write data is stored in a first cache sub region of the cache region and a response to the write request is transmitted to the host computer. In the case in which a page in the pool is unallocated to a virtual region of a write destination of the write data, a page is allocated to the virtual region, and write data is stored in the first cache sub region into the allocated page.

First claim

Opening claim text (preview).

The invention claimed is: 1. A storage system that is coupled to a host computer in such a manner that the storage system can communicate with the host computer, comprising: a plurality of storage devices that are a basis of a pool and a primary volume; and a controller that is coupled to the plurality of storage devices and the host computer and that is provided with a cache region, wherein the pool is configured by a plurality of pages, wherein the controller generates a s…

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What does patent US8935488B2 cover?
A storage system is provided with storage devices that are basis of a pool and a primary volume and a controller that is coupled to the plurality of storage devices and a host computer and that is provided with a cache region. In a case that a write request specifies a secondary volume storing a snapshot of a primary volume the write data is stored in a first cache sub region of the cache regio…
Who is the assignee on this patent?
Mizuno Yoichi, Hitachi Ltd
What technology area does this patent fall under?
Primary CPC classification G06F3/0611. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).