Raw_Read_Error_Rate 가 발생하는데

nas4dual 2개 장착해서 사용중 이번에 하드를 추가 했더니 1, 2 하드는 안그런데 3. 4 하드에서만 3번 하드 시게이트 8TB Raw_Read_Error_Rate 105938272 Spin_Up_Time 0 Start_Stop_Count 4 Reallocated_Sector_Ct 0 Seek_Error_Rate 877726 Power_On_Hours 64 Spin_Retry_Count 0 Power_Cycle_Count 4 Unknown_Attribute 0 Unknown_Attribute 0 Unknown_Attribute 0 Temperature_Celsius 858128432 Power-Off_Retract_Count 1 Load_Cycle_Count 153 Temperature_Celsius 48 Hardware_ECC_Recovered 105938272 Current_Pending_Sector 0 Offline_Uncorrectable 0 UDMA_CRC_Error_Count 0 Head_Flying_Hours 125739462557706 Unknown_Attribute 1743505460 Unknown_Attribute 315827452 4번 시게이트 2TB Raw_Read_Error_Rate 66341432 Spin_Up_Time 0 Start_Stop_Count 12 Reallocated_Sector_Ct 0 Seek_Error_Rate 67557 Power_On_Hours 26 Spin_Retry_Count 0 Power_Cycle_Count 11 Unknown_Attribute 0 Unknown_Attribute 0 Unknown_Attribute 0 Unknown_Attribute 0 Unknown_Attribute 0 Temperature_Celsius 756940841 G-Sense_Error_Rate 0 Power-Off_Retract_Count 9 Load_Cycle_Count 112 Temperature_Celsius 41 Current_Pending_Sector 0 Offline_Uncorrectable 0 UDMA_CRC_Error_Count 0 Head_Flying_Hours 140733193388051 Unknown_Attribute 581371609 Unknown_Attribute 12482347 에러카운트가 증가하네요