Snapshot acquisition method, storage system and disk apparatus
First Claim
1. A snapshot acquisition method in a storage system including a storage apparatus for storing data and a NAS processing apparatus that provides file service via a communication path and is connected to the storage apparatus, the snapshot acquisition method comprising:
- managing snapshots by the NAS processing apparatus;
upon receiving at the NAS processing apparatus a data renewal request to renew data targeted for snapshot, issuing from the NAS processing apparatus a data copy instruction to a copy apparatus of the storage apparatus to copy the data targeted for snapshot; and
preserving by the copy apparatus the data in a separate region of the storage apparatus based on the received data copy instruction sent from the NAS processing apparatus;
wherein the preserving step is performed by the copy apparatus of the storage apparatus.
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Accused Products
Abstract
A network attached storage (NAS) system includes a disk array unit equipped with a copy device that copies data, and a NAS processing unit that provides file service via a network and is connected via a communication path to the disk array unit. The NAS processing unit is equipped with a snapshot management device that manages snapshots. The snapshot management device of the NAS processing unit designates a physical block to be copied as a snapshot. The copy device on the disk array unit copies the designated physical block within the disk array unit to create a snapshot and stores the snapshot in a separated region. The snapshot management device of the NAS processing unit manages meta data of the snapshot data in a manner accessible by the user depending on requirements.
90 Citations
21 Claims
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1. A snapshot acquisition method in a storage system including a storage apparatus for storing data and a NAS processing apparatus that provides file service via a communication path and is connected to the storage apparatus, the snapshot acquisition method comprising:
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managing snapshots by the NAS processing apparatus; upon receiving at the NAS processing apparatus a data renewal request to renew data targeted for snapshot, issuing from the NAS processing apparatus a data copy instruction to a copy apparatus of the storage apparatus to copy the data targeted for snapshot; and preserving by the copy apparatus the data in a separate region of the storage apparatus based on the received data copy instruction sent from the NAS processing apparatus; wherein the preserving step is performed by the copy apparatus of the storage apparatus. - View Dependent Claims (2, 3, 4, 5)
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6. A storage system comprising:
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a storage apparatus for storing data, the storage apparatus including a copy device that copies data; and a NAS processing apparatus that provides file service via a communication path and is connected to the storage apparatus, the NAS processing apparatus including a snapshot management device that manages snapshots, wherein, upon receiving a data renewal request to renew data targeted for snapshot, the snapshot management device issues a data copy instruction to the copy device of the storage apparatus to copy the data targeted for snapshot; and the copy device receives the data copy instruction from the snapshot management device and copies the data based on the received data copy instruction, and preserves the data in a separate region of the storage apparatus. - View Dependent Claims (7, 8, 9, 10)
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11. A snapshot acquisition method in a storage system including a storage apparatus for storing data and a NAS processing apparatus that provides file service via a communication path and is connected to the storage apparatus, the snapshot acquisition method comprising:
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managing snapshots by the NAS processing apparatus; issuing from the NAS processing apparatus a physical address of data targeted for duplication; duplicating by a copy unit of the storage apparatus the data targeted for duplication based on the physical address of the data targeted for duplicating, in a separate region of the storage apparatus; wherein the duplicating step is performed by the copy unit of the storage apparatus; isolating by the copy unit of the storage apparatus the duplicated data based on an instruction from the NAS processing apparatus; and setting by the copy unit of the storage apparatus one of the duplicated data as a snapshot. - View Dependent Claims (12, 13)
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14. A storage system comprising:
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a storage apparatus for storing data, the storage apparatus including a data duplicating device that duplicates data; and a NAS processing apparatus that provides file service via a communication path and is connected to the storage apparatus, the NAS processing apparatus including a snapshot management device that manages snapshots, wherein the snapshot management device issues to the data duplicating device a duplication instruction including a physical address of data targeted for duplication; the duplicating device of the storage apparatus receives the duplication instruction from the snapshot management device and duplicates the data targeted for duplication based on the physical address of the data targeted for duplication issued from the snapshot management device of the NAS processing apparatus, isolates the duplicated data based on the duplication instruction from the NAS processing apparatus, and sets one of the duplicated data as a snapshot. - View Dependent Claims (15, 16)
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- 17. A storage apparatus in combination that is controllable by a NAS processing apparatus that provides file service through a communication path, the storage apparatus comprising a copy device that copies data, wherein, upon receiving a data renewal request to renew data targeted for snapshot, the NAS processing apparatus issues a data copy instruction to the copy device of the storage apparatus to copy the data targeted for snapshot, and the copy device of the storage apparatus copies the data based on the received data copy instruction, and the copy device of the storage apparatus preserves the data in a separate region of the storage apparatus.
- 20. A storage apparatus in combination that is controllable by a NAS processing apparatus that provides me service through a communication path, the storage apparatus comprising a duplicating device that duplicates data, wherein the duplicating device duplicates the data targeted for duplication based on a duplication instruction and physical address of the data targeted for duplication issued from the NAS processing apparatus, isolates the duplicated data based on the received duplication an instruction from the NAS processing apparatus, and sets one of the duplicated data as a snapshot.
Specification