A method, non-transitory computer readable medium, and device that assists with identifying failure of a storage disk includes obtaining performance data and a threshold value associated with each of the obtained performance data for a plurality of storage disks. Next, the obtained performance data is compared with the corresponding threshold value associated with each of the obtained performance data to determine for one or more initial failures in the plurality of storage disks. Next, one or more operational test cases are executed on each of the determined one or more initial failures in the plurality of storage disks to determine for one or more false positives in the determined one or more initial failures in the plurality of storage disks. A notification is sent based on the determination of the one or more false positives.