remove uncorrectable sectors message

[pete_mor]

Hi,

Today that I logged to my freenas 8.3 I got the following error message

Code:

May 13 12:12:31 freenas smartd[40230]: Device: /dev/da2 [SAT], 128 Currently unreadable (pending) sectors
May 13 12:12:31 freenas smartd[40230]: Device: /dev/da2 [SAT], 128 Offline uncorrectable sectors

I performed a smartctl test and got the following

Code:

smartctl -a /dev/da2
 
smartctl 5.43 2012-06-30 r3573 [FreeBSD 8.3-RELEASE-p4 amd64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net
 
=== START OF INFORMATION SECTION ===
Model Family:    Seagate Barracuda (SATA 3Gb/s, 4K Sectors)
Device Model:    ST2000DM001-1CH164
Serial Number:    Z2F0E464
LU WWN Device Id: 5 000c50 04e606f55
Firmware Version: CC43
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:    512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:  8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Mon May 12 15:56:38 2014 EEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
 
=== START OF READ SMART DATA SECTION ===
SMART STATUS RETURN: incomplete response, ATA output registers missing
SMART overall-health self-assessment test result: PASSED
Warning: This result is based on an Attribute check.
 
General SMART Values:
Offline data collection status:  (0x00) Offline data collection activity
                                        was never started.
                                        Auto Offline Data Collection: Disabled.
Self-test execution status:      ( 121) The previous self-test completed having
                                        the read element of the test failed.
Total time to complete Offline
data collection:                (  617) seconds.
Offline data collection
capabilities:                    (0x73) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        No Offline surface scan supported.
                                        Self-test supported.
                                        Conveyance Self-test supported.
                                        Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                                        power-saving mode.
                                        Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                                        General Purpose Logging supported.
Short self-test routine
recommended polling time:        (  1) minutes.
Extended self-test routine
recommended polling time:        ( 251) minutes.
Conveyance self-test routine
recommended polling time:        (  2) minutes.
SCT capabilities:              (0x3085) SCT Status supported.
 
SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG    VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate    0x000f  111  099  006    Pre-fail  Always      -      37188568
  3 Spin_Up_Time            0x0003  091  091  000    Pre-fail  Always      -      0
  4 Start_Stop_Count        0x0032  100  100  020    Old_age  Always      -      39
  5 Reallocated_Sector_Ct  0x0033  092  092  036    Pre-fail  Always      -      11232
  7 Seek_Error_Rate        0x000f  071  060  030    Pre-fail  Always      -      13617924
  9 Power_On_Hours          0x0032  087  087  000    Old_age  Always      -      11817
10 Spin_Retry_Count        0x0013  100  100  097    Pre-fail  Always      -      0
12 Power_Cycle_Count      0x0032  100  100  020    Old_age  Always      -      40
183 Runtime_Bad_Block      0x0032  100  100  000    Old_age  Always      -      0
184 End-to-End_Error        0x0032  100  100  099    Old_age  Always      -      0
187 Reported_Uncorrect      0x0032  100  100  000    Old_age  Always      -      0
188 Command_Timeout        0x0032  100  100  000    Old_age  Always      -      0
189 High_Fly_Writes        0x003a  090  090  000    Old_age  Always      -      10
190 Airflow_Temperature_Cel 0x0022  060  050  045    Old_age  Always      -      40 (Min/Max 18/42)
191 G-Sense_Error_Rate      0x0032  100  100  000    Old_age  Always      -      0
192 Power-Off_Retract_Count 0x0032  100  100  000    Old_age  Always      -      37
193 Load_Cycle_Count        0x0032  100  100  000    Old_age  Always      -      1880
194 Temperature_Celsius    0x0022  040  050  000    Old_age  Always      -      40 (0 15 0 0 0)
197 Current_Pending_Sector  0x0012  100  100  000    Old_age  Always      -      128
198 Offline_Uncorrectable  0x0010  100  100  000    Old_age  Offline      -      128
199 UDMA_CRC_Error_Count    0x003e  200  200  000    Old_age  Always      -      0
240 Head_Flying_Hours      0x0000  100  253  000    Old_age  Offline      -      234475149602277
241 Total_LBAs_Written      0x0000  100  253  000    Old_age  Offline      -      18138964064
242 Total_LBAs_Read        0x0000  100  253  000    Old_age  Offline      -      14023406812
 
SMART Error Log Version: 1
No Errors Logged
 
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline      Completed: read failure      90%    11815        2737632440
# 2  Short offline      Completed: read failure      50%    11806        2737632440
# 3  Short offline      Completed: read failure      90%    11782        2737630848
# 4  Short offline      Completed without error      00%    11758        -
# 5  Short offline      Completed without error      00%    11734        -
 
SMART Selective self-test log data structure revision number 1
SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

From the above what I understand is that the drive might fail in the future right?

As this drive only holds backups that are not essential, I have decided to keep the drive as long as it lasts. Is there a way to remove the error message that is displayed in freenas or even fix the problem so that freenas won't try to read/write to these sectors?

thanks for your time

 

[cyberjock]

Well, right now you have 128 for current pending sector. If you can find all 128 bad sectors and you write to every single one the error will clear.

There's no way to remove that message except to disable SMART monitoring. After all, the whole reason for SMART monitoring *is* to find problems like you are having.

The drive isn't failing in the future.. it's already failing. 128 sectors worth of data are currently known to be unreadable. If you are running a RAIDZ2, RAIDZ3 or 3-disk mirror and you have to restore from said pool your redundancy will probably keep your data safe. But, you should not be running your server in a condition where you are relying on your redundancy just to have a full copy of your data.

My recommendation is to order a replacement for that drive and replace it as soon as possible.