Labcoat,  You can access the boot menu via F11 at startup and then select System Utilities- Launch Diagnostics. You can then run a DST short test on the drives.  Most of the time, unless hardware in drive fails, the drive will go to predicted failure before failing completely.
I recently purchased a Dell R720XD with 24 SSD MLC SATA drives, model number: mz5ea200hmdr Checking iDrac and with Dell, I find there is not an easy way to follow life-left on these drives?  Is this the case?  Do they simply just go from working to fail without warning?
Use indicators for SSD MLC drives