Storage device and storage control method
AssigneeHitachi Vantara, Ltd.
InventorsKenta SATO, Takaki MATSUSHITA, Akira DEGUCHI
Life of this patent
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Abstract
A storage apparatus includes: a first storage node having a primary volume from or to which data is read or written with a host; and a second storage node, in which each of the first storage node and the second storage node holds a same reference snapshot volume, and the first storage node and the second storage node manage a snapshot volume based on difference data between the reference snapshot volume and the snapshot volume.
Claims13
A storage apparatus comprising:
- a first storage node having a primary volume from or to which data is read or written with a host;
- and
- a second storage node, wherein
- each of the first storage node and the second storage node holds a snapshot volume and a same reference snapshot volume, and
- the first storage node and the second storage node manage the snapshot volume based on difference data between the reference snapshot volume and the snapshot volume.
A storage control method for a storage system including a first storage node having a primary volume from or to which data is read or written with a host, and a second storage node, the storage control method comprising:
- a holding step of holding a snapshot volume and a same reference snapshot volume in each of the first storage node and the second storage node;
- and
- a management step of managing the snapshot volume based on difference data between the reference snapshot volume and the snapshot volume by the first storage node and the second storage node.
Dependencies are inferred from the claim text.