Detecting and predicting electronic storage device data anomalies

A computer system, comprising:

• one or more computer processors;
• a memory coupled to at least one of the processors;
• and
• a set of computer program instructions stored in the memory and executed by at least one of the one or more computer processors in order to perform actions of:
• performing phase-based predictions on a plurality of storage devices to determine a plurality of sampling scopes and corresponding sampling ratios, wherein the respective sampling scopes comprise at least one storage device of the plurality of storage devices;
• obtaining a sampling dataset by selecting a group of storage devices from the respective sampling scopes with the corresponding sampling ratios;
• and
• detecting device failure for the group of storage devices based on the sampling dataset.

A computer program product, comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a one or more processors to cause the one or more processors to perform actions of:

• performing phase-based predictions on a plurality of storage devices to determine a plurality of sampling scopes and corresponding sampling ratios, wherein the respective sampling scopes comprise at least one storage device of the plurality of storage devices;
• and
• obtaining a sampling dataset by selecting a group of storage devices from the respective sampling scopes with the corresponding sampling ratios;
• and
• detecting device failure for the group of storage devices based on the sampling dataset.