Report for Western Digital Red drive doesn't make sense

[aviram]

This is part of the 'smartctl -x /dev/sdf' output for a brand new WD Red 4TB drive that passed several self-tests:

Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     POSR-K   100   253   051    -    0
  3 Spin_Up_Time            POS--K   100   253   021    -    0
  4 Start_Stop_Count        -O--CK   100   100   000    -    2
  5 Reallocated_Sector_Ct   PO--CK   200   200   140    -    0
  7 Seek_Error_Rate         -OSR-K   200   200   000    -    0
  9 Power_On_Hours          -O--CK   100   100   000    -    10
 10 Spin_Retry_Count        -O--CK   100   253   000    -    0
 11 Calibration_Retry_Count -O--CK   100   253   000    -    0
 12 Power_Cycle_Count       -O--CK   100   100   000    -    2
192 Power-Off_Retract_Count -O--CK   200   200   000    -    1
193 Load_Cycle_Count        -O--CK   200   200   000    -    2
194 Temperature_Celsius     -O---K   108   108   000    -    44
196 Reallocated_Event_Count -O--CK   200   200   000    -    0
197 Current_Pending_Sector  -O--CK   200   200   000    -    0
198 Offline_Uncorrectable   ----CK   100   253   000    -    0
199 UDMA_CRC_Error_Count    -O--CK   200   200   000    -    0
200 Multi_Zone_Error_Rate   ---R--   100   253   000    -    0
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

It has pre-fail flags on 3 attributes that have 0 (zero) as raw values.

Why are those attributes marked as pre-fail ?
Is this a bug on smartmontools or I am interpreting this in a wrong way ?
Or should I configure drivedb.h correctly for this drive? Any tip on where to find WD documentation for these values?

Thank you

[Christian Franke]

Why are those attributes marked as pre-fail ?

Because someone at WD decided to mark these as pre-fail :-)

Is this a bug on smartmontools or I am interpreting this in a wrong way ?

An attribute would "FAIL" if the normalized VALUE falls below THRESH. The RAW_VALUE is not interpreted. Please read -A, --attributes section on smartctl man page for further info.

Or should I configure drivedb.h correctly for this drive?

You could only change the ATTRIBUTE_NAME or the RAW_VALUE print format via drivedb.h. The FLAGS VALUE WORST THRESH fields are always printed as provided by the drive.

Any tip on where to find WD documentation for these values?

No. There is often no publicy available documentation for HDD attributes.

[Christian Franke]

Smartctl works as expected, see above comment.