Shingled magnetic recording data store

A system comprising:

• a storage media including a two level key-value data store including a first level and a second level, wherein the first level comprises a plurality of first level bands, each of the first level bands containing journals of incoming writes and deletes;
• and
• a storage controller configured to order a plurality of data stores at the second level and store data in the two level key-value data store.

(canceled)

One or more computer-readable storage media encoding computer-executable instructions for executing on a computer system a computer process that reads only used shingled data tracks adjacent to a target track location, the computer process comprising:

• storing data in a two level key-value data store in an SMR storage device, wherein a first level of the data store comprises a journal of incoming host operations and a second level of the data store comprises a plurality of ordered data stores ordered based on a predetermined ordering criterion.