Systems and methods for background destaging storage tracks

A system for background destaging storage tracks from cache when at least one host is idle, the system comprising:

• a write cache configured to store a plurality of storage tracks and configured to be coupled to the at least one host;
• and
• a processor coupled to the write cache, wherein the processor comprises code that, when executed by the processor, causes the processor to:
• destage storage tracks from the write cache if the at least one host is idle,
• refrain from destaging storage tracks from the write cache if the at least one host is not idle,
• monitor each rank for write operations from the at least one host, and
• determining if the at least one host is idle with respect to each respective rank based on monitoring each rank for write operations from the at least one host such that the at least one host may be determined to be idle with respect to a first rank and not idle with respect to a second rank.

A physical computer storage memory comprising a computer program product for background destaging storage tracks from a write cache configured to store a plurality of storage tracks when at least one host is idle, the computer program product comprising:

• computer code for destaging storage tracks from the write cache if the at least one host is idle;
• computer code for refraining from destaging storage tracks from the write cache if the at least one host is not idle;
• computer code for monitoring each rank for write operations from the at least one host;
• and
• computer code for determining if the at least one host is idle with respect to each respective rank based on monitoring each rank for write operations from the at least one host such that the at least one host may be determined to be idle with respect to a first rank and not idle with respect to a second rank.