Method and system for improving flash storage read performance in partially programmed blocks

A system, comprising:

• a storage module comprising a storage module controller and persistent storage;
• and
• a control module operatively connected to the storage module and a client,
• wherein the control module:
• receives a first client read request for first data from the client, wherein the first client read request comprises a first logical address;
• determines a first physical address corresponding to the first logical address;
• makes a first determination that the first physical address is directed to an open block in the persistent storage;
• makes a second determination that the first physical address is directed to a last closed word line of the open block, and based on the first and the second determinations:
• obtains at least one first read threshold value for reading from the last closed word line of the open block;
• issues a control module read request comprising the at least one first read threshold value to the storage module, wherein the storage module comprises the open block;
• and
• wherein the storage module:
• receives the control module read request;
• and
• obtains the first data from the open block using the at least one first read threshold value.

A non-transitory computer readable medium comprising computer readable program code, which when executed by a computer processor enables the computer processor to:

• receive a first client read request for first data from a client, wherein the first client read request comprises a first logical address;
• determine a first physical address corresponding to the first logical address;
• make a first determination that the first physical address is directed to an open block in persistent storage;
• make a second determination that the first physical address is directed to a last closed word line of the open block, and based on the first and the second determinations:
• obtain at least one first read threshold value for reading from the last closed word line of the open block;
• issue a control module read request comprising the at least one first read threshold value to a storage module, wherein the storage module comprises the open block;
• and
• obtain the first data from the open block using the at least one first read threshold value.