NAND flash memory Organization issue
The numbers work out if you assume that only the 16k bytes per page are used for storage, and that only 512 blocks per plane are used.


16 kB/page &times; 1536 pages/block = 24 MB/block
24 MB/block &times; 512 blocks/plane = 12 GB/plane
12 GB/plane &times; 4 planes = 48 GB (which is 384 Gbits)


In a typical filesystem, the extra 2208 bytes per page are used for ECC and other housekeeping functions. And the extra 36 blocks per plane are probably reserved for redundancy (replacements for bad blocks).

Therefore, the different device sizes are constructed using 4, 8, 12, 16, 32 and 64 planes, giving nominal capacities of 48, 96, 144, 192, 384 and 768 GB, respectively.