Custom Query (1564 matches)

File scsiata.cpp contains comments claiming that it supports fixed format response to SCSI request sense command (response code 0x70 and 0x71). Indeed, the implementation of sat_device::ata_pass_through() parses such responses correctly and returns true. However, it does not fill the descriptor buffer (adrp). Function smartcommandhandler() in atacmds.cpp calls sat_device::ata_pass_through() and fails if descriptor values are absent, specifically lba_high and lba_mid. It is not clear to me how this should be fixed:

1. Use a different logic when fixed format is returned (instead of checking lba_high and lba_mid),
2. Or, issue SCSI request sense command with the DESC bit set, which would force the descriptor format. As that may cause problems with older devices, perhaps a parameter should be introduced, settable in drivedb.h.

User-visible symptoms of this bug are:

1. smartd refuses to monitor the affected drive, producing an error such as: "Device: /dev/sdd [SAT], not capable of SMART Health Status check"
2. smartctl shows SMART info correctly, but with a complaint: "SMART STATUS RETURN: incomplete response, ATA output registers missing"

This problem was noticed with external USB drive: WD MyPassport 2TB (WDBY8L0020BBL), USB: 1058:0748

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