Concurrent data restore and background copy operations in storage networks

A storage device, comprising:

• a processor;
• a memory module communicatively connected to the processor;
• logic instructions in the memory module which, when executed by the processor, configure the processor to:
• receive a signal that identifies a source volume and a first target snapshot that represents a point in time copy of the source volume;
• update metadata to define an restore relationship between the first target snapshot and the source volume;
• execute a background copy process between the first target snapshot and the source volume;
• and
• manage input/output operations during the background copy process to permit input/output operations to the source volume during the background copy process;
• guiesce input/output operations to a snapshot cache and a cache of the source volume:
• and
• flush the snapshot cache and the cache of the source volume to a storage disk.

A computer program product comprising logic instructions stored on a computer-readable medium which, when executed by a processor, configure the processor to:

• receive a signal that identifies a source volume and a first target snapshot that represents a point in time copy of the source volume;
• update metadata to define an restore relationship between the first target snapshot and the source volume;
• execute a background copy process between the first target snapshot and the source volume;
• and
• manage input/output operations during the background copy process to permit input/output operations to the source volume during the background copy process;
• quiesce input/output operations to a snapshot cache and a cache of the source volume;
• and
• flush the snapshot cache and the cache of the source volume to a storage disk.