Transfer track format information for tracks in cache at a first processor node to a second process node to which the first processor node is failing over

A system coupled to a storage, comprising:

• a first processor node including a first cache to cache tracks from the storage;
• a second processor node including a second cache to cache tracks from the storage;
• wherein the first processor node and second processor node perform a failover from the first processor node to the second processor node by performing operations, the operations comprising:
• reassigning storage areas assigned to the first processor node to the second processor node;
• for each track indicated in a cache list of tracks in the first cache for the reassigned storage areas, determining whether track format information is available for the track in the first cache and adding, by the first processor node, a track identifier of the track and track format information indicating a layout and format of data in the track to a cache transfer list in response to determining that track format information is available for the track in the first cache;
• transferring, by the first processor node, the cache transfer list to the second processor node;
• and
• using, by the second processor node, the track format information transferred with the cache transfer list to process read and write requests to tracks in the reassigned storage areas staged into the second cache.

A method for managing failover from a first processor node including a first cache to a second processor node including a second cache, wherein the first cache and second cache are used to cache tracks from a storage, comprising:

• reassigning storage areas assigned to the first processor node to the second processor node;
• for each track indicated in a cache list of tracks in the first cache for the reassigned storage areas, determining whether track format information is available for the track in the first cache and adding, by the first processor node, a track identifier of the track and track format information indicating a layout and format of data in the track to a cache transfer list in response to determining that track format information is available for the track in the first cache;
• transferring, by the first processor node, the cache transfer list to the second processor node;
• and
• using, by the second processor node, the track format information transferred with the cache transfer list to process read and write requests to tracks in the reassigned storage areas staged into the second cache.