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AssigneeHitachi, Ltd.
InventorsYoichi Mizuno, Naoto Matsunami, Koji Sonoda, Shinichi Kishima, Manabu Kitamura
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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.
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 network and is connected via a communication path to the storage apparatus, the snapshot acquisition method comprising:
3 A snapshot acquisition method according to claim 1, wherein the data includes a plurality of files, and each of the files includes at least one block, wherein the data renewal request is an instruction to renew said at least one block in one of the files, wherein the storage apparatus copies said at least one block in the separate region.
A snapshot acquisition method according to claim 3, wherein the data copy instruction designates a physical address of said at least one block, a block length of said at least one block, and a physical address at a copy destination where said at least one block is copied.
A storage system comprising:
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 network and is connected via a communication path to the storage apparatus, the snapshot acquisition method comprising:
A storage system comprising:
A storage apparatus in combination that is controllable by a NAS processing apparatus that provides file service through a network, 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 to copy the data targeted for snapshot, and the copy device copies the data based on the data copy instruction, and preserves the data in a separate region.
A storage apparatus in combination that is controllable by a NAS processing apparatus that provides file service through a network, the storage apparatus comprising a duplicating device that duplicates data, wherein the duplicating device duplicates the data targeted for duplication based on a physical address of the data targeted for duplication issued from the NAS processing apparatus, isolates the duplicated data based on an instruction from the NAS processing apparatus, and sets one of the duplicated data as a snapshot.
Dependencies are inferred from the claim text.