On 2019-10-15 13:44, Steven Surdock wrote:
Model Family:     Western Digital Black
Device Model:     WDC WD4001FAEX-00MJRA0
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       
-       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       
-       9
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      
-       9
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       
-       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      
-       9

Looks like 9 bad sectors which can't be remapped for whatever reason. UDMA_CRC error count is on 0, which looks like your SATA cable is fine. The drive is kind of strange since it still claim Raw read error rate to have on 0.

Model Family:     Western Digital Black
Device Model:     WDC WD4003FZEX-00Z4SA0
Serial Number:    WD-WMC5D0D50MLK
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  
WHEN_FAILED RAW_VALUE
   1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       
-       6
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       
-       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       
-       0
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      
-       4
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       
-       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      
-       6

Looks like 4 uncorrectable sectors while 6 raw read error happened.

You can attempt to run -t long <drive> to learn more about your 2 drives (with -a following long test), but I still consider both drives happily dyeing.

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