Optimistic read operation

1. A method of executing a read operation in a non-volatile memory system, the method comprising:

receiving, with a front end module, a host read request to read a requested data set, the host read request identifying a logical address associated with the requested data set;

determining, with a cache checking module, whether an external copy of an entry stored in a non-volatile memory array of the non-volatile memory die, the entry mapping the logical address identified in the host read request to a physical address, is stored in an external memory that is external to the non-volatile memory die before performing a first sensing operation on the entry;

performing, with a sensing control module of a non-volatile memory die, the first sensing operation on the entry;

performing, with the sensing control module, a second sensing operation on a data set stored in the non-volatile memory array at the physical address identified in the entry without performing error correction on a copy of the data set generated in response to the second sensing operation, and

verifying, with a verification module, that the copy of the data set generated in response to the second sensing operation matches the requested data set before the front end module transfers the data set copy to the host.

2. The method of claim 1 , transferring the data set copy to the host when the verification module verifies that the data set copy matches the requested data set.

3. The method of claim 1 , wherein performing, with the sensing control module, the second sensing operation on the data set comprises performing, with the second control module, the second sensing operation on the data set without an interface of the non-volatile memory die sending a copy of the entry back to a controller of the non-volatile memory system after the sensing control module performs the first sensing operation on the entry.

4. The method of claim 1 , further comprising:

sending, with a sequencer module, a column address offset to an entry extraction module of the non-volatile memory die, the column address offset identifying the entry among a group of entries stored in the non-volatile memory array.

5. A method of executing a read operation in a non-volatile memory system, the method comprising:

receiving, with a front end module, a host read request to read a requested data set, the host read request identifying a logical address associated with the requested data set;

performing, with a sensing control module of a non-volatile memory die, a first sensing operation on an entry stored in a non-volatile memory array of the non-volatile memory die, the entry mapping the logical address identified in the host read request to a physical address;

performing, with a sensing control module of a non-volatile memory die, a first sensing operation on an entry stored in a non-volatile memory array of the non-volatile memory die, the entry mapping the logical address identified in the host read request to a physical address;

performing, with the sensing control module, a second sensing operation on a data set stored in the non-volatile memory array at the physical address identified in the entry without first performing error correction on a copy of the entry; and

verifying, with a verification module, that a copy of the data set generated in response to the second sensing operation matches the requested data set before the front end module transfers the data set copy to the host;

wherein the logical address identified in the host read request comprises a first logical address, the method further comprising:

comparing, with the verification module, the first logical address with a second logical address included in the data set copy to verify that the data set copy matches the requested data set.

6. A method of executing a read operation in a non-volatile memory system, the method comprising:

receiving, with a front end module, a host read request to read a requested data set, the host read request identifying a logical address associated with the requested data set;

performing, with a sensing control module of a non-volatile memory die, a first sensing operation on an entry stored in a non-volatile memory array of the non-volatile memory die, the entry mapping the logical address identified in the host read request to a physical address;

performing, with the sensing control module, a second sensing operation on a data set stored in the non-volatile memory array at the physical address identified in the entry without first performing error correction on a copy of the entry; and

verifying, with a verification module, that a copy of the data set generated in response to the second sensing operation matches the requested data set before the front end module transfers the data set copy to the host;

wherein the data set copy comprises a first data set copy, the physical address comprises a first physical address, and the entry copy comprises a first entry copy, the method further comprising:

when the verification module determines that the first data set copy does not match the requested data set:

storing a second copy of the entry in an external memory that is external the non-volatile memory die;

performing error correction on the second entry copy with an error correction module;

identifying, with a physical address identification module, a second physical address from the second entry copy after error correction is performed on the second entry copy; and

in response to identifying the second physical address, storing, in the external memory, a second data set copy of a second data set that is stored at the second physical address in the non-volatile memory array.