Scanner lost all data? in General Posted September 19, 2018 3 minutes ago, Thronic said: I was just watching Plex right now when it suddenly started to buffer, it never does that, ever.... I check the server next and loads of activity going and it acting all kinds of sluggish. I start scanner and notice it has reset all settings and all 10 drives suddenly marked as not checked ever. Are you sure their surface check data didn't just age past the "Check readable / unchecked every X days" number in the preferences area? It'll do it automatically depending on the Work Window settings under the General tab. i.e. if set to "Perform work at any time of the day" and set to 90 days, any scan data aging to 90+ days will trigger a new surface scan on that drive. Also - turning on "Scan using Background I/O priority" and "Do not interfere with disk access" (higher sensitivity means less drive competition/thrashing) can help with the buffering in other apps.