Alert won't go away

[JoeFlorida]

I got an alert that ada0 had failed self check on 2018-01-09. ada0 is my boot disk.
I backed up my settings, I replaced it, re-installed and restored settings, all is good but I can't get the alert from 2018-01-09 to go away.
Normally if you have a degraded volume, the alert leaves when the volume no longer degraded.
the self check alert just stays and lingers on, it's not even for the current drive in ada0.

 

[Redcoat]

Is this a USB boot stick that failed a SMART test? What is the error/alert message?

Edit - wrong question - is this an SSD boot disk ...?

 

[JoeFlorida]

I had issues with booting from the USB with the previous motherboard. I had a SATA SSD and spare SATA ports so I just used that. It was fairly old so I wasn't surprised it failed. below is the error minus the date.

Device: /dev/ada0, Read SMART Self-Test Log Failed

 

[Redcoat]

As I understand it (I hope appropriately), it's not uncommon for SMART tests to give misleading indications of issues with SSD's such that even a "good" SSD may report as having failed a self-test because of misinterpretation of one of the preprogrammed trigger criteria. Armed with that understanding I turned off the smart test for my SSD boot drive when that report appeared (very soon after I booted into 11.1).