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hi all,

my first mail to this list so apologies if this has been discussed recently.

i have a raid 10 array and 1 of the disks is acting up according to SMART and i'm not sure how to interpret the logs and if i should ignore, repair or replace.

smartd has been sending me several mails like this, they always come in pairs. (the dates mentioned in the mails are sometimes match the date of sending and sometimes are a week or month off, but this might be another problem, not sure. i think however it started after a power failure)

The following warning/error was logged by the smartd daemon:
Device: /dev/sde, 1 Currently unreadable (pending) sectors

AND

The following warning/error was logged by the smartd daemon:
Device: /dev/sde, 1 Offline uncorrectable sectors


smartctl --all /dev/sde
gives me the following, i've been trying to google this but some sources say replace the disk at once or don't wory, its harmless. Anybody can shed some light?


smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 7200.11
Device Model:     ST3500320AS
Serial Number:    5QM056TH
Firmware Version: SD04
User Capacity:    500,107,862,016 bytes
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   7
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Sun Mar  8 11:00:53 2009 CET
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:  (0x82)    Offline data collection activity
                   was completed without error.
                   Auto Offline Data Collection: Enabled.
Self-test execution status: ( 113) The previous self-test completed having
                   the read element of the test failed.
Total time to complete Offline
data collection:          ( 634) 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:      (   1) minutes.
Extended self-test routine
recommended polling time:      ( 106) minutes.
Conveyance self-test routine
recommended polling time:      (   2) minutes.
SCT capabilities:            (0x003b)    SCT Status supported.
                   SCT Feature Control supported.
                   SCT Data Table 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 114 099 006 Pre-fail Always - 132023209 3 Spin_Up_Time 0x0003 093 092 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 159 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 35 7 Seek_Error_Rate 0x000f 074 060 030 Pre-fail Always - 21613621419 9 Power_On_Hours 0x0032 089 089 000 Old_age Always - 9858 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 037 020 Old_age Always - 159 184 Unknown_Attribute 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 082 082 000 Old_age Always - 18 188 Unknown_Attribute 0x0032 100 098 000 Old_age Always - 4295032838 189 High_Fly_Writes 0x003a 001 001 000 Old_age Always - 344 190 Airflow_Temperature_Cel 0x0022 071 048 045 Old_age Always - 29 (Lifetime Min/Max 27/31) 194 Temperature_Celsius 0x0022 029 052 000 Old_age Always - 29 (0 21 0 0) 195 Hardware_ECC_Recovered 0x001a 028 021 000 Old_age Always - 132023209 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 1 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 1 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0

SMART Error Log Version: 1
ATA Error Count: 18 (device log contains only the most recent five errors)
   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 18 occurred at disk power-on lifetime: 9008 hours (375 days + 8 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 00 4b 10 95 00

 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 00 80 9f 0e 95 40 00  17d+17:02:58.471  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:58.471  IDENTIFY DEVICE
 2f 00 01 10 00 00 a0 00  17d+17:02:58.348  READ LOG EXT
 60 00 80 9f 0e 95 40 00  17d+17:02:56.547  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:56.546  IDENTIFY DEVICE

Error 17 occurred at disk power-on lifetime: 9008 hours (375 days + 8 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 00 4b 10 95 00

 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 00 80 9f 0e 95 40 00  17d+17:02:56.547  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:56.546  IDENTIFY DEVICE
 2f 00 01 10 00 00 a0 00  17d+17:02:56.441  READ LOG EXT
 60 00 80 9f 0e 95 40 00  17d+17:02:54.640  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:54.639  IDENTIFY DEVICE

Error 16 occurred at disk power-on lifetime: 9008 hours (375 days + 8 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 00 4b 10 95 00

 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 00 80 9f 0e 95 40 00  17d+17:02:54.640  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:54.639  IDENTIFY DEVICE
 2f 00 01 10 00 00 a0 00  17d+17:02:54.534  READ LOG EXT
 60 00 80 9f 0e 95 40 00  17d+17:02:52.707  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:52.707  IDENTIFY DEVICE

Error 15 occurred at disk power-on lifetime: 9008 hours (375 days + 8 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 00 4b 10 95 00

 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 00 80 9f 0e 95 40 00  17d+17:02:52.707  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:52.707  IDENTIFY DEVICE
 2f 00 01 10 00 00 a0 00  17d+17:02:52.585  READ LOG EXT
 60 00 80 9f 0e 95 40 00  17d+17:02:50.792  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:50.791  IDENTIFY DEVICE

Error 14 occurred at disk power-on lifetime: 9008 hours (375 days + 8 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 00 4b 10 95 00

 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 00 80 9f 0e 95 40 00  17d+17:02:50.792  READ FPDMA QUEUED
 ec 00 00 00 00 00 a0 00  17d+17:02:50.791  IDENTIFY DEVICE
 2f 00 01 10 00 00 a0 00  17d+17:02:50.677  READ LOG EXT
 60 00 80 9f 0e 95 40 00  17d+17:02:48.845  READ FPDMA QUEUED
 60 00 00 9f 0a 95 40 00  17d+17:02:48.845  READ FPDMA QUEUED

SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Completed: read failure 10% 9849 917923767 # 2 Extended offline Completed without error 00% 9685 - # 3 Extended offline Completed without error 00% 9594 - # 4 Extended offline Completed: read failure 90% 9512 9769035 # 5 Extended offline Completed: read failure 90% 9344 9769035 # 6 Extended offline Completed: read failure 90% 9176 9769035 # 7 Extended offline Completed: read failure 90% 9008 9769035 # 8 Extended offline Completed without error 00% 8842 - # 9 Extended offline Completed without error 00% 8674 - #10 Extended offline Completed: read failure 40% 8505 675183097 #11 Extended offline Completed: read failure 40% 8342 675183097 #12 Extended offline Completed: read failure 40% 8170 675183097 #13 Extended offline Completed: read failure 40% 8002 675183097 #14 Extended offline Completed without error 00% 7835 - #15 Extended offline Completed without error 00% 7673 - #16 Extended offline Completed without error 00% 7503 - #17 Extended offline Completed without error 00% 7333 - #18 Extended offline Completed without error 00% 7165 - #19 Extended offline Completed without error 00% 6997 - #20 Extended offline Completed without error 00% 6833 - #21 Extended offline Completed without error 00% 6660 -

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.


--

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