I have a new SSD as a cache drive, and just started to get alerts (had them for 2 days so far)   First alert is:   Event: unRAID Cache disk SMART health [197] Subject: Warning [NAS] - current pending sector is 1 Description: CT250MX500SSD1_1803E10AC5FE (sdf) Importance: warning   then - 20 mins later, a 'clear' alert   Event: unRAID Cache disk SMART message [197] Subject: Notice [NAS] - current pending sector returned to normal value Description: CT250MX500SSD