Method and apparatus for executing host commands

An apparatus for executing host commands, comprising:

• a flash interface, coupled to a flash module;
• a random access memory (RAM), arranged operably to allocate space for a command queue;
• a processing unit, coupled to the RAM and the flash interface;
• and
• a host interface, coupled to a host side and the RAM, comprising:
• a first logical block address (LBA) shifting circuit, arranged operably to determine whether a preset number of successive unaligned host long-write commands have been detected, wherein a first starting LBA number of data to be written, which is requested by each unaligned host long-write command, does not align with a first physical page of one super page in a flash module;
• when determining that the preset number of successive unaligned host long-write commands have been detected, calculate an offset, so that a second starting LBA number of data to be written, which is requested by a host write command, plus the offset aligns with a first physical page of one super page in the flash module;
• generate a third starting LBA number by adding the offset to the second starting LBA number;
• store an entry in an LBA shifting table, which comprises information about the second starting LBA number and the offset, in the RAM, wherein the second starting LBA number represents a separating LBA number;
• and output the third starting LBA number associated with the host write command to a designated location in the command queue, thereby enabling a firmware translation layer to drive the flash interface for programming data into the flash module in accordance with the third starting LBA address associated with the host write command.