This is a tool that I haven't seen discussed much on these forums, and it's a program I have been using for years. HDSentinel is a program that is designed to examine the SMART data of your hard drives, look at drive temperatures, perform tests, and other features that people with large amounts of hard drives (like myself) love to be able to look at quickly.
The program has a freeware version that will give you a percentage rating of how well your hard drives and SSDs are running, and once it gets below a certain percentage rating it will suggest that you consider backing up all of your data from that drive onto another storage space because that drive might be on the verge of failing. I can't tell you exactly how many hard drives I have running in my household, but it's over 30 drives and those drives are anywhere between 250GB and 6TB (as well as a few 120GB SSDs) and this utility is designed to quickly let you examine each drive's SMART data and give you a percentage rating of how well your hard drive(s) are running and if they are starting to fail or are in tip-top shape.
While there is a free version, there is also a paid version (which I own) that gives you more access to other drives such as external hard drives like USB hard drives, eSATA drives, Thunderbolt drives, and many more types of drives that aren't directly connected to your computer. You can also keep the application running in the background and have any of your hard drives' temperatures in your system tray so you can keep an eye out on how hot the drive gets when it's being read and written to, which can be handy in certain situations...and especially if you have a large amount of drives like I do.
I have no affiliations with HDSentinel or the company that creates the software, but I have used it for years and use it religiously to monitor my drives' statistics to make sure that all of my drives are performing well and aren't about to conk out on me. They also have a portable version you can download directly from their website that you can just unzip to a directory and run the HDSentinel.exe application and quickly take a look at the health of all of your hard drives.
Here is the link if anybody is interested:
As mentioned earlier, there are freeware versions available as well as professional and even enterprise versions available for being able to monitor drives across your entire network without having to physically be in front of the computer/server to check the drive's health.
I hope this program is helpful for you guys, as it has actually saved me from having dealing with the loss of data from some of my older hard drives that I still have around and still use.