Method for rebuilding flash translation layer table of solid state drive

A solid state drive, comprising:

• a controlling circuit;
• a buffering element connected with the controlling circuit;
• and
• a non-volatile memory connected with the controlling circuit, wherein the non-volatile memory comprises plural superblocks, each of the plural superblocks comprises plural superpages, and each of the plural superpages comprises plural physical pages,
• wherein the controlling circuit confirms if a flash translation layer table is lost or not after the solid state drive is powered on;
• wherein if the flash translation layer table is lost, the controlling circuit starts a superblock scanning method for determining a status of a selected superblock of the plural superblocks;
• and rebuilds the flash translation layer table according to the status of the selected superblock,
• wherein the controlling circuit reads contents of a first physical page and a last physical page of a last superpage in the selected superblock, and determines whether the selected superblock is a closed superblock according to only the contents of the first physical page and the last physical page of the last superpage in the selected superblock.