Since April 30, I've gotten 7 warning emails from one host, 5 from another, and 2 from another; each email claims there is 1 CurrentPendingSector failed; that is, currently unreadable (pending). On each host, it's the same type of drive, a CT1000MX500SSD1 (Crucial 1TB) Running smartctl manually shows *no* sectors failed. systemctl status shows info like this: Jun 13 21:29:19 pm2 smartd: Device: /dev/sda [SAT], 1 Currently unreadable (pending) sectors Jun 14 00:29:18 pm2 smartd: Device: /dev/sda [SAT], No more Currently unreadable (pending) sectors, warning condition reset after 1 email Does this imply that the drives are actually kicking up errors but fixing them? (I thought SSDs did that silently, until wearout, with a different SMART attribute indicating percentage.) It doesn't appear to be service impacting, but I'm not finding good info via Google. Has anybody else seen this, or is this an obvious question for Crucial?