I'm in need about some interpretation for the UDMA_CRC_error_count values of HGST drives. The value 200 reports everythings ok, Unraid throws a SMART error and Crystal says everythings fine.

 

What does UDMA_CRC_error_count on HGST drives mean?

 

Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     HGST HUS724020ALA640

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     PO-R--   100   100   016    -    0
  2 Throughput_Performance  P-S---   137   137   054    -    78
  3 Spin_Up_Time            POS---   163   163   024    -    503 (Average 260)
  4 Start_Stop_Count        -O--C-   100   100   000    -    154
  5 Reallocated_Sector_Ct   PO--CK   100   100   005    -    0
  7 Seek_Error_Rate         PO-R--   100   100   067    -    0
  8 Seek_Time_Performance   P-S---   142   142   020    -    25
  9 Power_On_Hours          -O--C-   100   100   000    -    5979
 10 Spin_Retry_Count        PO--C-   100   100   060    -    0
 12 Power_Cycle_Count       -O--CK   100   100   000    -    151
192 Power-Off_Retract_Count -O--CK   100   100   000    -    166
193 Load_Cycle_Count        -O--C-   100   100   000    -    166
194 Temperature_Celsius     -O----   230   230   000    -    26 (Min/Max 11/39)
196 Reallocated_Event_Count -O--CK   100   100   000    -    0
197 Current_Pending_Sector  -O---K   100   100   000    -    0
198 Offline_Uncorrectable   ---R--   100   100   000    -    0
199 UDMA_CRC_Error_Count    -O-R--   200   200   000    -    128
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

 

Edited February 9, 20197 yr by hawihoney

2 minutes ago, hawihoney said:

What does UDMA_CRC_error_count on HGST drives mean?

It means the same as in all other drives, a bad connection, vast majority of times a bad SATA cable, but note the attribute doesn't reset, so if you change the cable and as long as the value doesn't keep increasing problem is solved.

Thanks a lot. Will keep an eye on that drive.