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Should these I/O errors concern me?
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Should these I/O errors concern me?

raindog308raindog308 Administrator, Moderator
edited December 2016 in Help

Saw this on my home Linux box's dmesg. Should I freak out?

The box has four two-disk mirrors - a pair of WD 250GBs for root, and then three pairs of WD Black for storage:

[11701214.651503] md: md0: data-check done.
[11744796.070089] md: md6: data-check done.
[11745112.247575] md: md5: data-check done.
[11754308.149938] md: md4: data-check done.
[12224216.822156] ata5.00: exception Emask 0x0 SAct 0x3e0 SErr 0x0 action 0x0
[12224216.822165] ata5.00: irq_stat 0x40000008
[12224216.822172] ata5.00: failed command: READ FPDMA QUEUED
[12224216.822183] ata5.00: cmd 60/08:28:d8:9a:9d/00:00:d0:00:00/40 tag 5 ncq 4096 in
         res 41/40:00:d8:9a:9d/00:00:d0:00:00/00 Emask 0x409 (media error) 
[12224216.822188] ata5.00: status: { DRDY ERR }
[12224216.822191] ata5.00: error: { UNC }
[12224216.823754] ata5.00: configured for UDMA/133
[12224216.823776] sd 4:0:0:0: [sde] Unhandled sense code
[12224216.823781] sd 4:0:0:0: [sde]  
[12224216.823784] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[12224216.823787] sd 4:0:0:0: [sde]  
[12224216.823790] Sense Key : Medium Error [current] [descriptor]
[12224216.823796] Descriptor sense data with sense descriptors (in hex):
[12224216.823798]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 
[12224216.823813]         d0 9d 9a d8 
[12224216.823820] sd 4:0:0:0: [sde]  
[12224216.823824] Add. Sense: Unrecovered read error - auto reallocate failed
[12224216.823828] sd 4:0:0:0: [sde] CDB: 
[12224216.823830] Read(16): 88 00 00 00 00 00 d0 9d 9a d8 00 00 00 08 00 00
[12224216.823848] end_request: I/O error, dev sde, sector 3499989720
[12224216.823854] md/raid1:md4: sde1: rescheduling sector 3499725528
[12224216.823879] ata5: EH complete
[12224216.869466] md/raid1:md4: redirecting sector 3499725528 to other mirror: sdf1
# cat /proc/mdstat 
Personalities : [raid1] 
md6 : active raid1 sdh1[0] sdb1[1]
      5860389888 blocks super 1.2 [2/2] [UU]
      bitmap: 0/44 pages [0KB], 65536KB chunk

md5 : active raid1 sda1[0] sdg1[1]
      5860389888 blocks super 1.2 [2/2] [UU]
      bitmap: 0/44 pages [0KB], 65536KB chunk

md4 : active raid1 sdf1[0] sde1[1]
      5860389888 blocks super 1.2 [2/2] [UU]
      bitmap: 0/44 pages [0KB], 65536KB chunk

md0 : active raid1 sdd1[0] sdc1[1]
      233899840 blocks super 1.0 [2/2] [UU]
      bitmap: 1/2 pages [4KB], 65536KB chunk

unused devices: 
# for disk in sda sdb sdc sdd sde sdf sdg sdh ; do smartctl -a /dev/$disk | grep overall-health ; done
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
SMART overall-health self-assessment test result: PASSED
sda:Device Model:     WDC WD60EFRX-68MYMN1
sdb:Device Model:     WDC WD60EFRX-68MYMN1
sdc:Device Model:     WDC WD2500AAJS-00B4A0
sdd:Device Model:     WDC WD2500AAJS-75M0A0
sde:Device Model:     WDC WD60EFRX-68MYMN1
sdf:Device Model:     WDC WD60EFRX-68MYMN1
sdg:Device Model:     WDC WD60EFRX-68MYMN1
sdh:Device Model:     WDC WD60EFRX-68MYMN1
# smartctl -a /dev/sde
smartctl 6.4 2014-10-07 r4002 [x86_64-linux-3.16.0-4-amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD60EFRX-68MYMN1
Serial Number:    WD-WX11D259VU9E
LU WWN Device Id: 5 0014ee 2613e4ae7
Firmware Version: 82.00A82
User Capacity:    6,001,175,126,016 bytes [6.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5700 rpm
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Dec 19 18:34:46 2016 PST
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:  (0x00) Offline data collection activity
                    was never started.
                    Auto Offline Data Collection: Disabled.
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:        ( 5024) seconds.
Offline data collection
capabilities:            (0x7b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    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:    (   2) minutes.
Extended self-test routine
recommended polling time:    ( 703) minutes.
Conveyance self-test routine
recommended polling time:    (   5) minutes.
SCT capabilities:          (0x303d) 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     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   201   200   021    Pre-fail  Always       -       8933
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       29
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   085   085   000    Old_age   Always       -       11377
 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       -       29
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       22
193 Load_Cycle_Count        0x0032   199   199   000    Old_age   Always       -       5781
194 Temperature_Celsius     0x0022   113   101   000    Old_age   Always       -       39
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   Offline      -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]

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.

For LET support, please visit the support desk.

Comments

  • I would definitely be worried and would schedule a (long) test immediately on sde to confirm if it is a disk block error or some transport/other error (relatively benign and usually not permanent without any long term consequences).

    I'm also very concerned that for over 11000 hours (that presumably you have been running the drive), you've not run even ONE test (as per the SMART logs). That is definitely bad practice and I would start scheduling regular short/long/offline tests immediately on all the drives.

    It's a 6TB drive - so it's going to take a while (~10-12 hours or so?) to finish the test.

    HTH.

  • @nullnothere said:
    I'm also very concerned that for over 11000 hours (that presumably you have been running the drive), you've not run even ONE test (as per the SMART logs). That is definitely bad practice and I would start scheduling regular short/long/offline tests immediately on all the drives.

    Let the non-believer's sins be cleansed by the almighty power of SMARTCTL!

    Thanked by 1nullnothere
  • @Microlinux unless the drive completely dies before the test ends LOL

    Thanked by 1Dormeo
  • i did not saw any write errors, how old are your disks i mean when did you bought them ?

    Thomas - Technical Support - ikoula.com

    hyperv vps /-/ xen cloud vm /-/ dedicated servers

  • mailcheapmailcheap Member, Provider

    A short test should find any major problems quickly; even if it doesn't fail completely it'll show error counter log. If "Non-medium error count" is above 0, replace it.

    @Ikoula said:
    i did not saw any write errors, how old are your disks i mean when did you bought them ?

    Had 2 HGST SAS made in '16 fail after 6 months on separate occasions. Older not always bad when it comes to disks it seems; unpredictable at best. Smart/Mdadm tests/reporting can give better results when it comes to disk integrity.

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