Method of and system for testing remote storage
First Claim
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1. A storage system, which comprises:
- a first volume connected to receive data from a source volume;
a second volume;
means for transferring data from said first volume to said second volume;
means for suspending transfer of data from said first volume to said second volume in response to instructions to accept test I/O requests;
means for servicing, with said second volume, test I/O requests from a secondary host computer to test I/O between said second volume and said secondary host computer during suspension of transfer of data from said first volume to said second volume; and
,means for resuming transfer of data from said first volume to said second volume in response to instructions to stop accepting test I/O requests;
wherein said means for servicing test I/O requests includes a third volume;
wherein said source volume is a primary volume of a primary storage system, said first volume is a front-end volume of a secondary storage system, said second volume is a secondary volume of said secondary storage system, and said third volume is an alternate volume of said secondary storage system.
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Abstract
A remote backup storage system that may be tested with current backup data while the remote system continues to received data from a primary source data storage system includes a remotely located front-end volume that is connected to receive data from a source volume. A remotely located secondary volume normally receives data from the front-end volume. The secondary volume is the volume to which data of the source volume is backed up. The front-end volume serves as buffer for data transferred from the source volume to the secondary volume. A third volume that is used to preserve or restore the data in the secondary volume during a test.
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Citations
23 Claims
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1. A storage system, which comprises:
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a first volume connected to receive data from a source volume; a second volume; means for transferring data from said first volume to said second volume; means for suspending transfer of data from said first volume to said second volume in response to instructions to accept test I/O requests; means for servicing, with said second volume, test I/O requests from a secondary host computer to test I/O between said second volume and said secondary host computer during suspension of transfer of data from said first volume to said second volume; and
,means for resuming transfer of data from said first volume to said second volume in response to instructions to stop accepting test I/O requests; wherein said means for servicing test I/O requests includes a third volume; wherein said source volume is a primary volume of a primary storage system, said first volume is a front-end volume of a secondary storage system, said second volume is a secondary volume of said secondary storage system, and said third volume is an alternate volume of said secondary storage system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of providing backup services, which comprises:
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receiving data from a source volume at a remotely located first volume; transferring data from said first volume to a remotely located second volume; suspending transfer of data from said first volume to said second volume in response to instructions to accept test I/O requests; servicing, with said second volume, test I/O requests from a secondary host system to test I/O between said second volume and said secondary host system during suspension of transfer of data from said first volume to said second volume, resuming transfer of data from first volume to said second volume in response to instructions to stop accepting test I/O requests; and creating a snapshot of said second volume in response to said instructions to accept test I/O requests; wherein said source volume is a primary volume of a primary storage system, said first volume is a front-end volume of a secondary storage system, said second volume is a secondary volume of said secondary storage system, and said third volume is an alternate volume of said secondary storage system. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification