Maintaining track format metadata for target tracks in a target storage in a copy relationship with source tracks in a source storage

A computer program product for managing read and write requests to a target storage and configured to communicate with a source storage, the computer program product comprising a computer readable storage medium having computer readable program code embodied therein that is executable to communicate with a cache and to perform operations, the operations comprising:

• receiving a request to a requested target track in the target storage in a point-in-time copy relationship with a source track in the source storage;
• staging the source track from the source storage to the cache to be used as the requested target track;
• including a track format code, identifying track format metadata for the staged source track, in a cache control block for the staged source track;
• and
• using the track format code in the cache control block to determine the track format metadata to process subsequent requests to the requested target track in the cache.

A system for managing read and write requests to a target storage and in communication with a target storage, comprising:

• a processor;
• a cache;
• and
• a computer readable storage medium having computer readable program code embodied therein that is executed by the processor to perform operations, the operations comprising:
• receiving a request to a requested target track in the target storage in a point-in-time copy relationship with a source track in the source storage;
• staging the source track from the source storage to the cache to be used as the requested target track;
• including a track format code, identifying track format metadata for the staged source track, in a cache control block for the staged source track;
• and
• using the track format code in the cache control block to determine the track format metadata to process subsequent requests to the requested target track in the cache.

A method for managing read and write requests to a target storage, comprising:

• receiving a request to a requested target track in the target storage in a point-in-time copy relationship with a source track in a source storage;
• staging the source track from the source storage to the cache to be used as the requested target track;
• including a track format code, identifying track format metadata for the staged source track, in a cache control block for the staged source track;
• and
• using the track format code in the cache control block to determine the track format metadata to process subsequent requests to the requested target track in the cache.