Managing parity operations using controller-specific parity bitmaps

Abstract

The disclosure describes systems, devices, and methods for tracking operations of controllers in a data storage environment on a per-controller basis. In an implementation, a method for re-performing an incomplete operation is provided. In the method, a controller reads, from a parity drive in the data storage environment, a parity bitmap associated with the controller. The parity bitmap includes sections each corresponding to a different controller in the data storage environment, and each section includes status indicators at specific locations indicative of a status of parity data stored at corresponding locations of a parity region of the parity drive. For each incomplete status indicator, the controller re-computes parity data based on source data associated with the status indicator, stores the parity data at a location of the parity region corresponding to a location of the status indicator in the parity bitmap, and updates the status indicator from incomplete to complete.