When i used to work at a webhosting company we just had a software that would check the health of the drives if the person had paid for it, instead of having to go to a particular server and go through the command line to do diagnose that a drive was about to fail. Most of the time we just had a big screen that would let use know when a server would go down we would go out to the floor and log into the machine and run some quick checks if it still didnt come back up then we would check health of the drivers etc. Most of the time its impossible to gauge when a drive is going to fail sometimes they just fail no matter what you do. It takes time to swap out and clone over the information to a new drive and reinstall.
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