Storage System and Method for Caching a Single Mapping Entry for a Random Read Command

A storage system comprising:

• a memory;
• and
• a controller configured to be in communication with the memory, wherein the controller is further configured to:
• determine whether a read command received from a host is a random read command, wherein the read command comprises a logical address;
• and
• in response to determining that the read command received from the host is a random read command, caching only a logical-to-physical address map entry associated with the logical address from a logical-to-physical address map stored in the memory instead of caching a larger segment of the logical-to-physical address map that contains the entry and other entries.

A storage system comprising:

• a memory;
• means for determining whether a read command received from a host is a random read command, wherein the read command comprises a logical address;
• and
• means for, in response to determining that the read command is a random read command, using a caching mode in which only a logical-to-physical address mapping entry for the logical address is cached.