Sequential data optimized sub-regions in storage devices

A method comprising:

• partitioning, by a memory controller, a memory array into a first portion and a second portion, the first portion and second portion having non-overlapping logical block addressing (LBA) ranges;
• assigning, by the memory controller, a first granularity of a first logical-to-physical (L2P) mapping table entry for the first portion of the memory array designated for a first usage;
• assigning, by the memory controller, a second granularity of a second L2P mapping table entry for the second portion of the memory array designated for a second usage, where the second granularity is not equal to the first granularity;
• storing, by the memory controller, data indicative of size of the first granularity and the second granularity in the memory array;
• and
• storing, by the memory controller, at least a portion of the first L2P mapping table entry and the second L2P mapping table entry in an L2P cache of the memory controller.

A non-transitory computer readable medium comprising instructions thereon that, when executed by a processor, cause the processor to perform operations comprising:

• partitioning a memory array into a first portion and a second portion, the first portion and second portion having non-overlapping logical block addressing (LBA) ranges;
• assigning a first granularity of a first logical-to-physical (L2P) mapping table entry for the first portion of the memory array designated for a first usage;
• assigning a second granularity of a second L2P mapping table entry for the second portion of the memory array designated for a second usage, where the second granularity is not equal to the first granularity;
• storing data indicative of size of the first granularity and the second granularity in the memory array;
• and
• storing at least a portion of the first L2P mapping table entry and the second L2P mapping table entry in an L2P cache.