System and method for resynchronizing mirrored volumes

A method, comprising:

• associating a second volume located at a secondary site with a second storage management device, wherein said secondary site is coupled to a primary site via a data link, and wherein said second volume is configured as a mirror of a first volume located at said primary site and associated with a first storage management device;
• in response to detecting a restoration of communication between said primary and said secondary sites following a failure of said data link, conveying to said second storage management device an indication of a data block written to said first volume subsequent to said failure of said data link;
• and
• dependent upon said indication, creating a snapshot of said data block as stored on said second volume prior to resynchronization of said data block.

A computer-accessible storage medium, comprising program instructions, wherein the program instructions are computer-executable to:

• associate a second volume located at a secondary site with a second storage management device, wherein said secondary site is coupled to a primary site via a data link, and wherein said second volume is configured as a mirror of a first volume located at said primary site and associated with a first storage management device;
• in response to detecting a restoration of communication between said primary and said secondary sites following a failure of said data link, convey to said second storage management device an indication of a data block written to said first volume subsequent to said failure of said data link;
• and
• dependent upon said indication, create a snapshot of said data block as stored on said second volume prior to resynchronization of said data block.