System and method for restoring data from secondary volume to primary volume in a data storage system
First Claim
1. A storage control system for restoring a remote point-in-time copy of data to a primary volume from a secondary volume, said secondary volume adapted to provide information of remote data stored on at least one remote storage disk, the system comprising:
- at least one local storage disk;
a primary storage controller that conducts a request for the remote point-in-time copy; and
a secondary storage controller coupled to the primary storage controller to receive the request from the primary storage controller and to transfer the remote point-in-time copy from the secondary storage controller to the primary storage controller thereby creating a local point-in-time copy;
said primary storage controller adapted to configure the primary volume to comprise information of the local point-in-time copy located on at least one local disk.
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Accused Products
Abstract
A method and system for retrieving data that is stored on a backup or secondary storage system located at a remote location to a local storage system. Restoring of backup data involves the transferring of a point-in-time copy of primary system data from a secondary storage system to the local system. The point-in-time copy is created on the secondary system using an asynchronous remote copy scheme. The point-in-time copy that is restored may be either an entire volume or portions thereof.
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Citations
17 Claims
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1. A storage control system for restoring a remote point-in-time copy of data to a primary volume from a secondary volume, said secondary volume adapted to provide information of remote data stored on at least one remote storage disk, the system comprising:
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at least one local storage disk;
a primary storage controller that conducts a request for the remote point-in-time copy; and
a secondary storage controller coupled to the primary storage controller to receive the request from the primary storage controller and to transfer the remote point-in-time copy from the secondary storage controller to the primary storage controller thereby creating a local point-in-time copy;
said primary storage controller adapted to configure the primary volume to comprise information of the local point-in-time copy located on at least one local disk. - View Dependent Claims (2, 5)
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3. A storage control system for restoring a remote point-in-time copy of data to a primary volume from a secondary volume, said secondary volume adapted to provide information of remote data stored on at least one remote storage disk, the system comprising:
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at least one local storage disk;
a primary storage controller that conducts a request for the remote point-in-time copy; and
a secondary storage controller coupled to the primary storage controller to receive the request from the primary storage controller and to transfer the remote point-in-time copy from the secondary storage controller to the primary storage controller thereby creating a local point-in-time copy, wherein the secondary storage system receives the point-in-time copy through an asynchronous remote copy process;
said primary storage controller adapted to configure the primary volume to comprise information of the local point-in-time copy located on at least one local disk, wherein the primary storage controller further comprises a snap volume to facilitate the asynchronous remote copy process.
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4. A storage control system for restoring a remote point-in-time copy of data to a primary volume from a secondary volume, said secondary volume adapted to provide information of remote data stored on at least one remote storage disk, the system comprising:
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at least one local storage disk;
a primary storage controller that conducts a request for the remote point-in-time copy; and
a secondary storage controller coupled to the primary storage controller to receive the request from the primary storage controller and to transfer the remote point-in-time copy from the secondary storage controller to the primary storage controller thereby creating a local point-in-time copy;
said primary storage controller adapted to configure the primary volume to comprise information of the local point-in-time copy located on at least one local disk, wherein the primary storage controller further comprises memory allocated to store a lookup table identifying remote copy occurrences.
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6. A storage control system as defined in claim further comprising a secondary host system coupled to the secondary storage controller.
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7. A storage control system as defined in claim wherein the secondary system is remotely located from the primary system.
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8. A storage control system for restoring a remote point-in-time copy of data to a primary volume from a secondary volume, said secondary volume adapted to provide information of remote data stored on at least one remote storage disk, the system comprising:
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at least one local storage disk;
a primary storage controller that conducts a request for the remote point-in-time copy; and
a secondary storage controller coupled to the primary storage controller to receive the request from the primary storage controller and to transfer the remote point-in-time copy from the secondary storage controller to the primary storage controller thereby creating a local point-in-time copy;
said primary storage controller adapted to configure the primary volume to comprise information of the local point-in-time copy located on at least one local disk, wherein only predetermined portions of the point-in-way copy are restored. - View Dependent Claims (9)
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10. A method of restoring data from a secondary storage system to a primary storage system, wherein the secondary system is remotely located from the primary system and the secondary system receives backup data transmissions via a communications link from the primary storage system, the restoring method comprising:
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identifying a valid remote point-in-time copy of the data on the secondary system;
requesting the secondary system transmit data associated with the remote point-in-time copy;
transmitting the data associated with the point-in-time copy from the secondary system to the primary system; and
configuring the primary system to access the transmitted data. - View Dependent Claims (11, 14, 16)
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12. A method of restoring data from a secondary storage system to a primary storage system, wherein the secondary system is remotely located from the primary system and the secondary system receives backup data transmissions via a communications link from the primary storage system, the restoring method comprising:
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identifying a valid remote point-in-time copy of the data on the secondary system;
requesting the secondary system transmit data associated with the remote point-in-time copy;
transmitting the data associated with the point-in-time copy from the secondary system to the primary system; and
configuring the primary system to access the transmitted data, wherein the backup data transmissions conducted from the primary storage system to the secondary storage system comprise asynchronous data transmissions;
wherein the primary storage system comprises a primary volume and a snap volume wherein the snap volume maps to the same physical locations as the primary volume said method further comprising the following step;
asynchronously transmitting backup copies of data from the primary storage system to the secondary storage system using the snap volume. - View Dependent Claims (13)
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15. A method of restoring data from a secondary storage system to a primary storage system, wherein the secondary system is remotely located from the primary system and the secondary system receives backup data transmissions via a communications link from the primary storage system, the restoring method comprising:
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identifying a valid remote point-in-time copy of the data on the secondary system;
requesting the secondary system transmit data associated with the remote point-in-time copy;
transmitting the data associated with the point-in-time copy from the secondary system to the primary system; and
configuring the primary system to access the transmitted data, wherein the point-in-time copy relates to predetermined portions of a volume.
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17. A program storage medium, readable by a computer, tangibly embodying a program of instructions executable by said computer for restoring a point-in-time copy of computer readable data to a local storage system having at least one local storage disk from a remote storage system having at least one remote storage disk, the program comprising instructions for:
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identifying a valid point-in-time copy present on the remote storage disk;
requesting the point-in-time copy to be transferred to the local storage system;
transferring the point-in-time copy to the local storage system; and
storing the point-in-time copy to the local storage disk.
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Specification