Generating parity for storage device

A solid state device (SSD) controller for generating a parity, comprising:

• a processor;
• and
• a memory coupled to the processor and storing programming for execution by the processor;
• the processor is configured to execute the programming to perform operations of:
• receiving input data to be stored to pages of a storage device, wherein each page is capable of being allocated with multiple codewords;
• configuring codewords of the pages into multiple groups, wherein each group has an integer number of codewords, wherein at least one of the pages is allocated with a non-integer number of codewords, and wherein the integer number is larger than the non-integer number;
• obtaining parities for the multiple groups;
• and
• storing the parities to reserved spaces of the storage device.

A non-transitory computer readable medium storing a program causing a computer to execute:

• receiving input data to be stored to pages of a storage device, wherein each page is capable of being allocated with multiple codewords;
• configuring codewords of the pages into multiple groups, wherein each group has an integer number of codewords, wherein at least one of the pages is allocated with a non-integer number of codewords, and wherein the integer number is larger than the non-integer number;
• obtaining parities for the multiple groups;
• and
• storing the parities to reserved spaces of the storage device.