System and method for managing data associated with copying and replication procedures in a data storage environment

A system for processing a host computer's request to write data to the source during a restoration of the source, the system comprising:

• a data storage system having a first volume of data denominated as as source being stored on a data storage system, and a second volume of data denominated as a clone and which has data content that is a copy of data content of the source being stored on the data storage system or on another data storage system;
• and
• computer-executable program logic stored in a computer readable storage medium configured for causing the following computer-executed steps to occur:
• restoring the source by copying data content from the clone to overwrite the data content of the source;
• queuing in memory any host computer requests to write or read data for the source that involve data that is being restored from the clone to the source during the queuing process;
• and
• copying any data needed to service the host computer requests to write or read data for the source, which step is denominated as a copy on demand step, wherein a map denominated as a copy on demand map is used to track extents being copied during the restoring step and the copy on demand map is used to coordinate the restoring and the copy on demand step to avoid data corruption.

A program product including computer-executable logic contained on a computer readable storage medium, for use in a data storage environment and being related to processing a host computer's request to write data to the source during a restoration of the source, wherein the data storage environment includes:

• a data storage system having a first volume of data denominated as a source being stored on a data storage system, and a second volume of data denominated as a clone and which has data content that is a copy of the data content of the source being stored on data storage system or on another data storage system;
• and
• the program product configured for causing the following computer-executed steps to occur:
• restoring the source by copying data content from the clone to overwrite the data content of the source;
• queuing in memory any host computer requests to write or read data for the source that involve data that is being restored from the clone to the source during the queuing process;
• and
• copying any data needed to service the host computer requests to write or read data for the source, which step is denominated as a copy on demand step, wherein a map denominated as a copy on demand map is used to track extents being copied during the restoring step and the copy on demand map is used to coordinate the restoring and the copy on demand step to avoid data corruption.