SATA hard resetting link

sata

Here is my dmesg output:

ata2.00: exception Emask 0x0 SAct 0x2 SErr 0x0 action 0x6 frozen
ata2.00: cmd 60/48:08:6f:13:3a/00:00:01:00:00/40 tag 1 ncq 36864 in
         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
ata2.00: status: { DRDY }
ata2: hard resetting link
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata2.00: configured for UDMA/133
ata2: EH complete
SCSI device sdb: 490350672 512-byte hdwr sectors (251060 MB)
sdb: Write Protect is off
sdb: Mode Sense: 00 3a 00 00
SCSI device sdb: drive cache: write back

What does it mean? Can someone exactly say what is the problem for this error codes? …(timeout) – ? or it's just another error.. or it is main error in this output?

Here is smart output:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x002f   196   196   051    Pre-fail  Always       -       72539
  3 Spin_Up_Time            0x0027   200   200   021    Pre-fail  Always       -       991
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       16
  5 Reallocated_Sector_Ct   0x0033   199   199   140    Pre-fail  Always       -       1
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   094   094   000    Old_age   Always       -       5010
 10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       15
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       8
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       7
194 Temperature_Celsius     0x0022   118   100   000    Old_age   Always       -       25
196 Reallocated_Event_Count 0x0032   199   199   000    Old_age   Always       -       1
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
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      -       0

I can see only one problem – Reallocated_Event_Count. It is 1. And there is also only one error in dmesg. Is it possible that Reallocated_Event_Count and error in dmesg is connected? The disk is only 5000 hours old… Before I have had the same issues … it is Western Digital RE2 250Gb disk.

Best Answer

No, the Reallocated_Event_Count should not cause the error in dmesg. The error in dmesg indicates that communication between the drive and the host chipset locked up and the drive needed to be reset. If this only happens once, I wouldn't consider it significant. If it occurs regularly, I would begin to wonder about upgrading the firmware in the drive, or seeing if the SATA cable in use was properly connected.

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