Cisco just announced a new Field notice regarding Defect ID CSCvt55829 which is an industry wide firmware index bug.
Under normal operation, after 40,000 power-on hours (4.5 years), the SSD will report that 0 GB of available storage space remains. The drive will go offline and become unusable.
These drives were used in the following C-Series products and there is a firmware upgrade to resolve the issue. For more information you can go to the Field Notice FN – 70545.