Crystal Disk Info: "Total Host Writes" shows two distinct values



Crystal Disk Info is a free, open-source software tool created by Japanese software developer and IT expert Crystal Dew World. It provides a comprehensive overview of the health of a PC’s storage devices, including hard drives, solid-state drives, and optical media.

When using Crystal Disk Info to evaluate the health of a drive, one of the key metrics that it can display is the “Total Host Writes” value. This metric is a measure of how much data has been written to the drive since it was first connected to the computer. It is typically used to assess the life expectancy of a drive, since drives that have been written to more often tend to wear out sooner than those that have been written to less.

However, it is not uncommon for Crystal Disk Info to show two distinct values for Total Host Writes. This discrepancy can be confusing for users who are not familiar with the software, as it is not explained in the user interface or documentation.

The reason for this discrepancy is that Crystal Disk Info displays two separate values for the same metric. The first is the “RAW” value, which is the total amount of data that has been written to the drive since it was first connected. The second is the “Host Writes” value, which is the amount of data that has been written to the drive since the last power cycle.

The “RAW” value is the more accurate of the two, as it reflects the total amount of data that has been written to the drive since it was first connected. The “Host Writes” value, on the other hand, only reflects the amount of data that has been written to the drive since the last power cycle. This means that if the drive has been powered off and on multiple times since it was first connected, the “Host Writes” value will be lower than the “RAW” value.

The difference between the “RAW” value and the “Host Writes” value can be used to help assess the age of a drive. If the “RAW” value is much higher than the “Host Writes” value, it is likely that the drive is older. Conversely, if the “RAW” value is much lower than the “Host Writes” value, it is likely that the drive is relatively new.

In summary, Crystal Disk Info shows two distinct values for Total Host Writes. The “RAW” value is the total amount of data that has been written to the drive since it was first connected, while the “Host Writes” value is the amount of data that has been written to the drive since the last power cycle. The difference between the two values can be used to help assess the age of a drive.

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