Critical Alert: Unreadable Sector

[RonRN18]

I just had a "Critical Alert" pop up for an unreadable sector on Sunday and have not had any time to figure out what is wrong. I don't see any reduced performance and hoping there is a simpler fix than replacing the hard drive.

• CRITICAL: Oct. 7, 2018, 11:16 a.m. - Device: /dev/ada2, 1 Currently unreadable (pending) sectors
• CRITICAL: Oct. 7, 2018, 11:51 p.m. - Device: /dev/ada2, Self-Test Log error count increased from 0 to 1

 

[Mihalich]

On one of the disks appeared one unreadable sector, there is nothing to do. If the number of errors will not increase, then just forget it.

 

[danb35]

and have not had any time to figure out what is wrong.

...or to search the forums, apparently.
https://forums.freenas.org/index.php?threads/critical-error-what-to-do-next.63451/