Let us first of all clarify what SMART data actually is. The acronym SMART stands for Self-Monitoring, Analysis and Reporting Technology, and that is exactly what the technology is. A SMART enabled storage drive monitors itself and collects data, and this data can be read and interpreted with the help of utilities capable of reporting the SMART data to the user. While this seems pretty straight-forward, there are a few things you need to be aware of as you interpret your SSD’s SMART data.
The first thing is that a lot of utilities for reporting SMART data were designed for HDDs, and because they are, they tend not to report SSD data correctly. The SMART attributes of an SSD are not organized in the same way the attributes of an HDD are, primarily because most of them don’t apply to a drive that is lacking any kind of moving parts.
This means that although the SMART data reported by an SSD will be correct and valid for the SSD, the attributes may not be correctly identified, which for obvious reasons leads to confusion. For example, when the “Power-on Hours Count” attribute reports a number to the utility, an incompatible utility may incorrectly label that number “Program Fail Count” or “Reported Uncorrectable Errors”. When that happens, a perfectly good SSD is incorrectly reported as a failing drive to the customer attempting to read the SMART data, all because he or she is not aware that they are using a utility that isn’t compatible with their SSD. It is in other words very important to use a utility that can correctly read the SMART layout of your SSD.
The Crucial Storage Executive tool will correctly report the SMART data on all supported Crucial SSD models. On storage drive models that are not supported by the Crucial Storage Executive, the tool will still report the SMART data. However, the attribute definitions will only be displayed for SSD models supported by the tool.
The second thing to remember is that SMART data is not a diagnostic tool. In fact, SMART data by itself is not an indicator of the general health and status of an SSD. Standard troubleshooting practices are far more reliable when it comes to determining the health status and reliability of an SSD, than any SMART data read-out.
Incorrectly reported or interpreted SMART data inevitably leads to incorrect conclusions which, if you’re unlucky, can lead to an RMA of a perfectly functional drive. Interpreted correctly on the other hand, the SMART data from your SSD can in some cases be a useful tool in troubleshooting your SSD. The important thing is to remember that those cases are fairly rare. SMART is one tool among many, and as with all tools, it works best when it is used the way it was intended.