Why is Uncorrectable Sector Count being displayed as caution?
You need to look at the raw value (8) in this case. There have been 8 events.
The raw value of this attribute indicates the total number of uncorrectable errors when reading/writing a sector.
In this particular case, I would keep an eye on the value and if it continues to increase then replace the drive:
This is a critical parameter. Degradation of this parameter may indicate imminent drive failure. Urgent data backup and hardware replacement is recommended.
S.M.A.R.T. Attribute: Uncorrectable Sector Count
Attribute ID: 198 (0xC6)
Hard drives, supporting this attribute
Samsung, Seagate, IBM (Hitachi), Fujitsu (not all models), Maxtor, Western Digital (not all models)
Description
Uncorrectable Sector Count S.M.A.R.T. parameter is a critical parameter and indicates the quantity of uncorrectable errors. The raw value of this attribute indicates the total number of uncorrectable errors when reading/writing a sector.
Recommendations
This is a critical parameter. Degradation of this parameter may indicate imminent drive failure. Urgent data backup and hardware replacement is recommended.
