Drive error - Unreadable (pending) sectors.

[jetsurgeon]

Hello,

I’m a relatively new FreeNAS user, I have about 2 months experience with FreeNAS under my belt, learning every day from this wonderful knowledge base here on the forum / community, you guys are the best.

In my email today I received 2 error emails from my FreeNAS box about one of my Hitachi / HGST Ultrastar 7K4000 drives. I’ll paste the two email errors below, and the hardware /software specs, along with the output of the “smartctl –a” output for the drive in question, in my case “/dev/da1”.

I don’t want to assume but I believe the drive is failing. I should probably swap it out with a replacement drive, then resilver, but before I do anything I’m looking for some guidance from you more experienced users. Hoping you guys can provide some guidance, I’m new to this stuff……..

Here we go……

Thanks!

Jeff

HARDWARE / SOFTWARE

MB: SUPERMICRO X8SIL-F
CPU: XEON x3470 @ 2.93 GHz
RAM: 32GB ECC (4 X 8Gb ECC 1333 MHz)
SATA Card: LSI SAS 9210-8i in IT Mode
Boot Drive: 128Gb SSD
NAS DRIVES: 8 X 4 TB Hitachi/HGST Ultrastar 7K4000
ZFS: RAID-Z2
FREENAS: 11.3 - U3
Plex: Installed in a Jail

Code:

EMAIL ERROR 1

FreeNAS @ freenas.local

New alerts:
* Device: /dev/da1 [SAT], 8 Currently unreadable (pending) sectors.

Current alerts:
* Device: /dev/da1 [SAT], 8 Currently unreadable (pending) sectors.

Code:

EMAIL ERROR 2

FreeNAS @ freenas.local

New alerts:
* Device: /dev/da1 [SAT], Self-Test Log error count increased from 0 to 1.

Current alerts:
* Device: /dev/da1 [SAT], 8 Currently unreadable (pending) sectors.
* Device: /dev/da1 [SAT], Self-Test Log error count increased from 0 to 1.

Code:

XXX@freenas[~]# smartctl -a /dev/da1
smartctl 7.0 2018-12-30 r4883 [FreeBSD 11.3-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PAJ3TPYS
LU WWN Device Id: 5 000cca 22bdde8df
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Tue Jun 23 03:55:20 2020 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x85) Offline data collection activity
                                        was aborted by an interrupting command from host.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                (   24) seconds.
Offline data collection
capabilities:                    (0x5b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        No 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:        (   1) minutes.
SCT capabilities:              (0x003d) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000b   086   086   016    Pre-fail  Always       -       119
  2 Throughput_Performance  0x0005   136   136   054    Pre-fail  Offline      -       80
  3 Spin_Up_Time            0x0007   117   117   024    Pre-fail  Always       -       657 (Average 667)
  4 Start_Stop_Count        0x0012   100   100   000    Old_age   Always       -       15
  5 Reallocated_Sector_Ct   0x0033   072   072   005    Pre-fail  Always       -       678
  7 Seek_Error_Rate         0x000b   100   100   067    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   119   119   020    Pre-fail  Offline      -       35
  9 Power_On_Hours          0x0012   100   100   000    Old_age   Always       -       1351
 10 Spin_Retry_Count        0x0013   100   100   060    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       15
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       55
193 Load_Cycle_Count        0x0012   100   100   000    Old_age   Always       -       55
194 Temperature_Celsius     0x0002   130   130   000    Old_age   Always       -       46 (Min/Max 24/55)
196 Reallocated_Event_Count 0x0032   072   072   000    Old_age   Always       -       681
197 Current_Pending_Sector  0x0022   100   100   000    Old_age   Always       -       8
198 Offline_Uncorrectable   0x0008   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x000a   200   200   000    Old_age   Always       -       0

SMART Error Log Version: 1
ATA Error Count: 1
        CR = Command Register [HEX]
        FR = Features Register [HEX]
        SC = Sector Count Register [HEX]
        SN = Sector Number Register [HEX]
        CL = Cylinder Low Register [HEX]
        CH = Cylinder High Register [HEX]
        DH = Device/Head Register [HEX]
        DC = Device Command Register [HEX]
        ER = Error register [HEX]
        ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 1 occurred at disk power-on lifetime: 987 hours (41 days + 3 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 78 98 7f c7 01  Error: UNC at LBA = 0x01c77f98 = 29851544

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 e8 70 10 87 c7 40 00   2d+21:04:06.397  READ FPDMA QUEUED
  60 00 68 10 86 c7 40 00   2d+21:04:06.397  READ FPDMA QUEUED
  60 00 38 10 85 c7 40 00   2d+21:04:06.397  READ FPDMA QUEUED
  60 00 30 10 84 c7 40 00   2d+21:04:06.397  READ FPDMA QUEUED
  60 00 28 10 83 c7 40 00   2d+21:04:06.397  READ FPDMA QUEUED

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%      1351         -
# 2  Extended offline    Completed: read failure       90%      1345         33801016
# 3  Short offline       Completed without error       00%      1273         -
# 4  Short offline       Completed without error       00%      1104         -
# 5  Short offline       Completed without error       00%      1090         -
# 6  Short offline       Completed without error       00%      1090         -
# 7  Short offline       Completed without error       00%      1080         -
# 8  Short offline       Completed without error       00%      1063         -
# 9  Short offline       Completed without error       00%      1056         -
#10  Short offline       Completed without error       00%      1039         -
#11  Short offline       Completed without error       00%      1039         -
#12  Short offline       Completed without error       00%      1032         -
#13  Short offline       Completed without error       00%      1008         -
#14  Short offline       Completed without error       00%       984         -
#15  Short offline       Completed without error       00%       960         -
#16  Short offline       Completed without error       00%       936         -
#17  Short offline       Completed without error       00%       912         -
#18  Short offline       Completed without error       00%       888         -
#19  Short offline       Completed without error       00%       864         -
#20  Short offline       Completed without error       00%       840         -
#21  Short offline       Completed without error       00%       816         -

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.

XXX@freenas[~]#

 

[sretalla]

Yes, that's a disk in the process of dying, replace it now.

 

[subhuman]

Agreed. POH 1351, relocated event count 681.
If that trend continues (and it most likely will!) the drive will soon be no more than a paperweight.

 

[jetsurgeon]

Thank you for the information and conformation on the error. I do have one HGST spare drive on hand, now to figure out how to replace this drive and resilver etc..... more reading to do! Know of any videos for v 11.3 to show the process?

thanks again!

 

[jetsurgeon]

Update...... After reading in the FreeNAS manual the section about "replacing a failing drive", and watching a few YouTube Videos on the process, I can successfully say my drive swap, and resilver went off without a hitch! Easy peasy.... ;) The 4 TB drive took around 6 hours to finish re silvering. Re added the new drive to the SMART schedules and were off to the races!

Thanks again guys, much appreciated!

Just waiting for the RMA on the drive and we'll be done with this little blip on the radar......

All the best,
Jeff