Critical Parameters

SMART 5: Reallocated_Sector_Count, 1-4 keep an eye on it, more than 4 replace

SMART 187: Reported_Uncorrect, 1 or more replace

SMART 188: Command_Timeout, 1-13 keep an eye on it, more than 13 replace

SMART 197: Current_Pending_Sector_Count, 1 or more replace

SMART 198: Offline_Uncorrectable, 1 or more replace