There is a SMART log. Let the thing run and any SMART warnings will go there. It's possible for a disk to fail and not give SMART errors, but running SMARTrep

There is a SMART log. Let the thing run and any SMART warnings will go there. It's possible for a disk to fail and not give SMART errors, but running SMARTreporter gives you more information about the state of a disk and whether it's behaving in a less-reliable manner. It's possible for a disk to read data and report it accurately, but require retries to compensate for failing hardware. SMART will report this sort of thing, when normal disk use will make it seem that the disk is still behaving as well as it was before.