Methods, devices and computer program products for copying data

A method of copying data, comprising:

• in response to receiving a command of copying data in a source address to a destination address, obtaining, at a first storage array, a first identifier associated with the source address and a second identifier associated with the destination address;
• determining a first logical storage unit associated with the first identifier and a second logical storage unit associated with the second identifier, one of the first and second logical units being located in a second storage array outside the first storage array;
• and
• copying, based on a small computer system interface (SCSI) command, the data in the source address of the first logical storage unit to the destination address of the second logical storage unit,
• the first and second identifiers being globally unique at least for the first storage array.

An electronic device, comprising:

• at least one processing unit;
• at least one memory coupled to the at least one processing unit and storing an instruction executed by the at least one processing unit, the instruction, when executed by the at least one processing unit, causing the device to execute acts of:
• in response to receiving a request for copying data in a source address to a destination address, sending a first query and a second query to a first storage array associated with the source address and a second storage array associated with the destination address;
• receiving, from the first storage array, a first identifier as a response to the first query, the first identifier indicating a first logical storage unit in the first storage array corresponding to the source address;
• receiving, from the second storage array, a second identifier as a response to the second query, the second identifier indicating a second logical storage unit in the second storage array corresponding to the destination address;
• and
• triggering, based on the first and second identifiers, a storage array in the first and second storage arrays supporting inter-array data copy to perform copying the data,
• the first and second identifiers being globally unique at least for the storage array being triggered.

An electronic device, comprising:

• at least one processing unit;
• at least one memory coupled to the at least one processing unit and storing an instruction executed by the at least one processing unit, the instruction, when executed by the at least one processing unit, causing the device to execute acts of:
• in response to receiving a command of copying data in a source address to a destination address, obtaining, at a first storage array, a first identifier associated with the source address and a second identifier associated with the destination address;
• determining a first logical storage unit associated with the first identifier and a second logical storage unit associated with the second identifier, one of the first and second logical units being located in a second storage array outside the first storage array;
• and
• copying, based on a Small Computer System Interface (SCSI) command, the data in the source address of the first logical storage unit to the destination address of the second logical storage unit,
• the first and second identifiers being globally unique at least for the first storage array.

A computer program product having a non-transitory computer readable medium which stores a set of instructions to copy data;

• the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
• in response to receiving a request for copying data in a source address to a destination address, sending a first query and a second query to a first storage array associated with the source address and a second storage array associated with the destination address;
• receiving, from the first storage array, a first identifier as a response to the first query, the first identifier indicating a first logical storage unit in the first storage array corresponding to the source address;
• receiving, from the second storage array, a second identifier as a response to the second query, the second identifier indicating a second logical storage unit in the second storage array corresponding to the destination address;
• and
• triggering, based on the first and second identifiers, a storage array in the first and second storage arrays supporting inter-array data copy to perform copying the data,
• the first and second identifiers being globally unique at least for the storage array being triggered.

A computer program product having a non-transitory computer readable medium which stores a set of instructions to copy data;

• the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
• in response to receiving a command of copying data in a source address to a destination address, obtaining, at a first storage array, a first identifier associated with the source address and a second identifier associated with the destination address;
• determining a first logical storage unit associated with the first identifier and a second logical storage unit associated with the second identifier, one of the first and second logical units being located in a second storage array outside the first storage array;
• and
• copying, based on a small computer system interface (SCSI) command, the data in the source address of the first logical storage unit to the destination address of the second logical storage unit,
• the first and second identifiers being globally unique at least for the first storage array.