Maintaining data consistency in mirrored cluster storage systems using bitmap write-intent logging

A method for maintaining mirrored data consistency between a primary networked storage node and a secondary networked storage node using write-intent logging, the method comprising:

• logging, on the primary networked storage node, an intent to write data, wherein logging comprises setting a bit in a gate bitmap, the bit corresponding to a storage area within the primary networked storage node where the data is to be written;
• in response to logging the intent to write data, storing the gate bitmap to a disk, wherein storing the gate bitmap to a disk comprises alternating between two distinct disk storage locations for the gate bitmap;
• verifying completion of storing the gate bitmap to the disk;
• if storing the gate bitmap to the disk is complete, writing the data to the primary networked storage node after logging the intent to write data;
• and
• relaying a request to the secondary networked storage node to mirror the data after logging the intent to write data.