Storage system for multi-site remote copy
First Claim
1. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from a host computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
- a plurality of first storage units; and
a first storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said first storage units related to a first volume,wherein said first storage system is adapted to comprise a first bitmap and a second bitmap, said first bitmap storing information related to data of a plurality of write requests received from said second storage system during a first time period, said second bitmap storing information related to data of a plurality of write requests received from said second storage system during a second time period being different from said first time period.
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Abstract
Information about remote copy target volumes of other storage systems 2 each having one and the same original volume V1 is registered for each remote copy target volume in advance. When there occurs a failure in a copy source storage system 2, a copy source volume for remote copy target volumes using the storage system 2 having a failure as their copy source is selected newly from the registered copy source volumes, and remote copy is resumed.
60 Citations
16 Claims
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1. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from a host computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
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a plurality of first storage units; and a first storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said first storage units related to a first volume, wherein said first storage system is adapted to comprise a first bitmap and a second bitmap, said first bitmap storing information related to data of a plurality of write requests received from said second storage system during a first time period, said second bitmap storing information related to data of a plurality of write requests received from said second storage system during a second time period being different from said first time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from a host computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
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a plurality of first storage unit; and a first storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said first storage units related to a first volume, wherein said first storage system is adapted to include a first bitmap and a second bitmap, said first bitmap storing information related to data of a plurality of write requests received from said second storage system during a first time period, said second bitmap storing information related to data of a plurality of write requests received from said second storage system during a second time period being different from said first time period. - View Dependent Claims (14, 15)
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12. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from an external computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
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a plurality of first storage units; and a first storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said first storage units related to a first volume, wherein said first storage control unit is adapted to relate to a first bitmap and a second bitmap, said first bitmap indicating information related to data received from said second storage system during a first time period, said second bitmap indicating information related to data received from said second storage system during a second time period being different from said first time period, and wherein, in the event of a disaster that affects said second storage system, said first storage system is adapted to function as a source storage system, which transfers data to be copied, or as a target storage system, which receives data to be copied.
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13. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from an external computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system by an asynchronous remote copy procedure and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
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a plurality of first storage units; a first storage control unit which receives data of said second volume from said second storage system by a synchronous remote copy procedure and stores data received from said second storage system into at least a portion of said first storage units related to a first volume; a first bitmap, in said first storage control unit, adapted to indicate information related to data received from said second storage system during a first time period; and a second bitmap, in said first storage control unit, adapted to indicate information related to data received from said second storage system during a second time period being different from said first time period, wherein said first storage system is adapted to be used as a source disk array system, which transfers data to be copied to said third storage system as a target storage system, in the event of a disaster that affects said second storage system.
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16. A first storage system adapted to be coupled to a second storage system and a third storage system, said second storage system including a plurality of second storage units and a second storage control unit which stores data received from an external computer into at least a portion of said second storage units related to a second volume, said third storage system adapted to be coupled to said second storage system and including a plurality of third storage units and a third storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said third storage units related to a third volume, said first storage system comprising:
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a plurality of first storage units; and a first storage control unit which receives data of said second volume from said second storage system and stores data received from said second storage system into at least a portion of said first storage units related to a first volume, wherein said first storage control unit is configured to store information related to data of a plurality of write requests received from said second storage system into a first area during a first time period and to store information related to data of a plurality of write requests received from said second storage system into a second area during a second time period being different from said first time period.
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Specification