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AssigneeEMC Corporation
InventorsIan Wigmore, Patrick Brian Riordan, Michael Scharland, Arieh Don
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A technique migrates data from a source array to a target array while preserving SCSI reservation compliance. The technique involves providing an active-to-passive instruction to the source array while a first SCSI reservation enables hosts to access data on the source array using MPIO software. The active-to-passive instruction directs the source array to transition devices from active mode to passive mode and, upon receipt of a next SCSI instruction, output an indicator indicating that the first SCSI reservation has been cleared. The technique further involves transitioning devices of the target array from passive mode to active mode and beginning a data transfer operation which transfers data from the source array to the target array. The technique further involves automatically effectuating formation of a second SCSI reservation in place of the first SCSI reservation, the second SCSI reservation providing host access to the data on the target array using MPIO software.
A method of migrating data from a storage device of a source array to a storage device of a target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform host read and write operations and (ii) a passive mode in which that storage device is not permitted to perform host read and write operations, the method comprising:
A data storage array to operate as a target array involved in a migration process in which data is migrated from a storage device of a source array to a storage device of the target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform host read, write and reservation operations and (ii) a passive mode in which that storage device is not permitted to perform host read, write and reservation operations, the data storage array comprising:
A computer program product which includes a non-transitory computer readable storage medium storing instructions to perform, when executed on a computerized processor of a target array, a method of migrating data from a storage device of a source array to a storage device of the target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform read, write and reservation operations and (ii) a passive mode in which that storage device is not permitted to perform read, write and reservation operations, the method comprising:
A method of migrating data from a storage device of a source array to a storage device of a target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform host read, write and reservation operations and (ii) a passive mode in which that storage device is not permitted to perform host read, write and reservation operations, the method comprising:
A data storage array to operate as a source array involved in a migration process in which data is migrated from a storage device of the source array to a storage device of a target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform host read, write and reservation operations and (ii) a passive mode in which that storage device is not permitted to perform host read, write and reservation operations, the data storage array comprising:
A computer program product which includes a non-transitory computer readable storage medium storing instructions to perform, when executed on a computerized processor of a source array, a method of migrating data from a storage device of the source array to a storage device of a target array while preserving small computer system interface (SCSI) reservation compliance, each storage device being capable of operating in (i) an active mode in which that storage device is permitted to perform read, write and reservation operations and (ii) a passive mode in which that storage device is not permitted to perform read, write and reservation operations, the method comprising:
Dependencies are inferred from the claim text.