Data writing method, valid data identifying method and memory storage apparatus

A memory storage apparatus, comprising:

• a connection interface unit, configured to be coupled to a host system;
• a rewritable non-volatile memory module, comprising a plurality of memory sub-modules, and each of the memory sub-modules comprising a plurality of physical programming units;
• and
• a memory control circuit unit, coupled to the connection interface unit and the memory sub-modules of the rewritable non-volatile memory module,
• wherein the memory control circuit unit is configured to receive first data,
• wherein the memory control circuit unit is further configured to use a first programming mode to write first sub-data of the first data into a first physical programming unit of at least one first memory sub-module among the memory sub-modules, wherein a size of each of the first sub-data is the same as a preset size,
• wherein the memory control circuit unit is further configured to use a second programming mode to write remaining sub-data other than the first sub-data of the first data into a second physical programming unit of a second memory sub-module among the memory sub-modules, wherein a size of the remaining sub-data is less than the preset size,
• wherein the number of bits stored by each of the physical programming units programmed by using the first programming mode is greater than the number of bits stored by each of the physical programming units programmed by using the second programming mode,
• wherein the second memory sub-module is different from a third memory sub-module of the at least one first memory sub-module which is a last memory sub-module for writing the first sub-data.

A valid data identifying method for a rewritable non-volatile memory module comprising a plurality of memory sub-modules coupled to a memory control circuit unit, each of the memory sub-modules comprising a first area and a second area, each of the first areas and each of the second areas respectively comprising a plurality of physical programming units, and the valid data identifying method comprising:

• when the rewritable non-volatile memory module is powered on, searching among at least one first data number in the first areas of the memory sub-modules to obtain a third data number, wherein the third data number is greater than the other data numbers among the at least one first data number;
• searching among at least one second data number in the second areas of the memory sub-modules to obtain a fourth data number, wherein the fourth data number is greater than the other data numbers among the at least one second data number;
• and
• determining whether valid data is stored in the second areas according to the third data number and the fourth data number.

A memory storage apparatus, comprising:

• a connection interface unit, configured to be coupled to a host system;
• a rewritable non-volatile memory module, comprising a plurality of memory sub-modules, each of the memory sub-modules comprising a first area and a second area, and each of the first areas and each of the second areas respectively comprising a plurality of physical programming units;
• and
• a memory control circuit unit, coupled to the connection interface unit and the memory sub-modules of the rewritable non-volatile memory module,
• wherein when the rewritable non-volatile memory module is powered on, the memory control circuit unit is configured to search among at least one first data number in the first areas of the memory sub-modules to obtain a third data number, wherein the third data number is greater than the other data numbers among the at least one first data number,
• wherein the memory control circuit unit is further configured to search among at least one second data number in the second areas of the memory sub-modules to obtain a fourth data number, wherein the fourth data number is greater than the other data numbers among the at least one second data number,
• wherein the memory control circuit unit is further configured to determine whether valid data is stored in the second areas according to the third data number and the fourth data number.