Good: The hard disk works normally without any errors or problems.

Note: There may be some problems with the hard disk, so it is necessary to monitor the state of the hard disk. There may be some minor errors or warning messages.

Bad: There is a serious problem with the hard disk, so you need to back up the data immediately and replace the hard disk. This state is usually related to a serious error or failure of the intelligent attribute.

Unknown: The hard disk information cannot be read or interpreted, possibly because the hard disk does not support SMART or there are some unpredictable problems.

So there is nothing wrong with your hard drive.