Described here in are systems, methods and, software to verify storage media and storage subsystems upon deployment. In one example, a computer apparatus to test storage media in a storage subsystem includes processing instructions that direct a computing system to identify initiation of a storage subsystem, initiate a testing process of the storage media, and identify a partition availability event for the storage media. The processing instructions also direct the computing system to, in response to the partition availability event, make a partition of the storage media available to a host processing system, wherein the partition comprises storage locations in the storage media tested via the testing process, and continue the testing process on the storage media. The computer apparatus also includes one or more non-transitory computer readable media that store the processing instructions.