Sector-based data compression

A method of operating a memory system, the method comprising:

• receiving write data at a memory array of a memory system, wherein the memory array includes multiple sectors of a same memory cell size, wherein a sector is assigned a block size to store compressed data of the assigned block size and different sectors of the memory array are assigned a different block size;
• compressing the write data;
• writing compressed write data to an invalid data block of a first sector having a smallest block size that can store the compressed write data;
• and
• writing the compressed write data to an open data block indicated by a write cursor of a second sector assigned a block size that can store the compressed write data when an invalid data block is not available to store the compressed write data.

A computing system comprising:

• a memory system including a memory array including memory cells, and a memory controller operatively coupled to the memory array;
• and
• a host system configured to send host data blocks to the memory system;
• and
• wherein the memory controller is configured to:
• access a physical memory space of the memory array as multiple sectors of a same memory size;
• assign a block size to the sectors to store data blocks of the assigned block size, wherein different block sizes are assigned to different sectors;
• assign a portion of the sectors as page table sectors, wherein a page table sector includes a page table to map the host data blocks to data blocks of the sectors;
• compress a host data block received from the host system into compressed write data;
• write the compressed write data to an invalid data block of a first sector, wherein the invalid data block has a smallest block size that can store the compressed data;
• write the compressed write data to an open data block indicated by a write cursor of a second sector assigned a block size that can store the compressed write data when an invalid data block is not available to store the compressed write data;
• and
• update a page table in a page table sector when the compressed write data is written.