Method and system for storing excess data in a redundant array of independent disk level 6

A system in a storage control device for storing excess data in a redundant array of independent disks (RAID) 6 volume, comprising:

• a processor;
• and
• a memory coupled to the processor and configured for temporarily storing a set of instructions, when executed by the processor, causes the processor to perform a method comprising:
• writing excess data to Q parity blocks of a first RAID 6 volume when a receipt of the excess data directed to the first RAID 6 volume is detected subsequent to a saturation of the first RAID 6 volume, wherein the first RAID 6 volume is converted to a pseudo-RAID 5 volume with P parity blocks;
• re-computing the P parity blocks of the pseudo-RAID 5 volume based on data blocks of the pseudo-RAID 5 volume;
• and
• constructing a second RAID 6 volume based on the pseudo-RAID 5 volume when at least one additional drive is inserted to the pseudo-RAID 5 volume.

A non-transitory computer readable medium for storing excess data in a redundant array of independent disks (RAID) 6 volume having instructions that, when executed by a computer, cause the computer to perform a method comprising:

• writing excess data to Q parity blocks of a first RAID 6 volume when a receipt of the excess data directed to the first RAID 6 volume is detected subsequent to a saturation of the first RAID 6 volume, wherein the first RAID 6 volume is converted to a pseudo-RAID 5 volume with P parity blocks;
• re-computing the P parity blocks of the pseudo-RAID 5 volume based on data blocks of the pseudo-RAID 5 volume;
• and
• constructing a second RAID 6 volume based on the pseudo-RAID 5 volume when at least one additional drive is inserted to the pseudo-RAID 5 volume.