Efficient media scan operations for storage systems

A storage virtualization subsystem (SVS) comprising:

• an array of PSDs each having data storage space for storing data therein;
• a controller coupled to the PSD array for executing IO operations in response to IO requests from a host entity to access the PSD array;
• wherein the controller is implemented with a media scan mechanism to perform the steps of:
• arranging a range of sections of media of PSDs to perform media scan operations;
• scheduling the media scan operations;
• selecting a section in the range;
• verifying media of the selected section;
• determining the status of the selected section to be ok or not ok;
• and
• responding by proceeding with the corrective action processes if the status is not ok, and by, if the status is ok, selecting another section in the range to proceed with the verifying step, the determining step, and the responding step, until there is no more section in the range to be verified.

A computer system comprising:

• a host computer;
• an array of PSDs each having data storage space for storing data therein;
• a storage virtualization controller coupled between the host computer and the PSD array for executing IO operations in response to IO requests from the host computer to access the PSD array;
• wherein the controller is implemented with a media scan mechanism to perform the steps of:
• arranging a range of sections of media of PSDs to perform media scan operations;
• scheduling the media scan operations;
• selecting a section in the range;
• verifying media of the selected section;
• determining the status of the selected section to be ok or not ok;
• and
• responding by proceeding with the corrective action processes if the status is not ok, and by, if the status is ok, selecting another section in the range to proceed with the verifying step, the determining step, and the responding step, until there is no more section in the range to be verified.