Greetings,
There are 4 revs of this board. Also don't know which BIOS rev you are running. In general, if you want to fully understand and confirm a disks health, use the manufacturers diagnostic utility which will give you insight into SMART parameters.
Going back in time... many BIOS had SMART monitoring built in. I haven't seen a BIOS with anything more than general "predictive failure" warnings displayed during POST for quite some time. By the time this happens, a disk will already be well on its way to failure.
In your case, protecting your data should be your primary focus. By whatever means is necessary. Slaving the disk in another machine, using a "toaster" etc. Then you can decide how much time you want to spend determining disk health.