Seagate's SMART attributes often cause unnecessary anxiety due to their seemingly high raw values. This is because Seagate uses a special format for these values.
Each SMART attribute raw value occupies 48 bits and consists of two parts:
This attribute counts read errors that occurred while reading data from the disk surface.
Despite often showing large numbers, it's the error-to-operation ratio that matters, not the absolute values.
If the upper 16 bits (error count) are zero or very low compared to operations, your drive is healthy.
Tracks errors that occur when the drive head attempts to seek to a specific location.
Upper 16 bits show actual seek errors, lower 32 bits show total seeks performed.
A healthy drive may have millions of seeks but very few errors.
Counts errors that were successfully corrected by the drive's Error Correction Code.
Like other Seagate attributes, the large numbers typically represent total operations, not errors.
Some ECC corrections are normal and don't indicate drive failure.