Local nonvolatile write-through cache for a data server having network-based data storage, and related operating methods

A method of operating a data server system comprising a data server, a network-based data storage architecture coupled to the data server, and a non-network-based nonvolatile write-through cache device locally attached to the data server, the method comprising:

• receiving instructions to read designated data that was previously written by the data server;
• issuing a local read request for the designated data, the local read request calling for data stored in the non-network-based nonvolatile write-through cache device;
• and
• issuing a network read request for the designated data, the network read request calling for data stored in the network-based data storage architecture.

A host adapter system for a data server, the host adapter system comprising:

• a local storage controller module for a locally attached nonvolatile write-through cache device of the data server, the local storage controller module being configured to control writing of server-maintained data at the locally attached nonvolatile write-through cache device;
• and
• a network storage controller module for a network-based data storage architecture of the data server, the network storage controller module being configured to control duplicate writing of the server-maintained data at the network-based storage architecture;
• wherein the local storage controller module issues a local read request for designated data maintained by the data server, the local read request being intended for the locally attached nonvolatile write-through cache device, and wherein the network storage controller module concurrently issues a network read request for the designated data, the network read request being intended for the network-based storage architecture.