SMART error that I ignore?

[calgarychris]

Hi, I'm a newb - please be kind! :) I've searched the forums and I can't find a clear answer...I got an email alert today that read:

The following warning/error was logged by the smartd daemon:
Device: /dev/ada2, ATA error count increased from 0 to 2
For details see host's SYSLOG.
You can also use the smartctl utility for further investigation.

I don't know how to see the SYSLOG, but I did run smartctl -a on /dev/ada2 which gave the information below (sorry for the long post):


Is this something I need to worry about or can it be safely ignored?

Thanks very much!
Chris

=== 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: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (24155) 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: ( 255) 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 100 100 016 Pre-fail Always - 0
2 Throughput_Performance 0x0005 135 135 054 Pre-fail Offline - 96
3 Spin_Up_Time 0x0007 135 135 024 Pre-fail Always - 406 (Average 407)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 3991
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 146 146 020 Pre-fail Offline - 29
9 Power_On_Hours 0x0012 100 100 000 Old_age Always - 4391
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 90
192 Power-Off_Retract_Count 0x0032 097 097 000 Old_age Always - 3993
193 Load_Cycle_Count 0x0012 097 097 000 Old_age Always - 3993
194 Temperature_Celsius 0x0002 222 222 000 Old_age Always - 27 (Min/Max 17/39)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
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: 2
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 2 occurred at disk power-on lifetime: 4389 hours (182 days + 21 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 6b 57 ac cd 04 Error: UNC at LBA = 0x04cdac57 = 80587863

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 55 6b 57 ac cd 44 ff 1d+08:05:07.702 READ FPDMA QUEUED
60 55 70 c3 ad cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 55 68 18 ad cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 ab 60 17 ac cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 ab 60 6c ab cd 40 00 1d+08:05:07.696 READ FPDMA QUEUED

Error 1 occurred at disk power-on lifetime: 4389 hours (182 days + 21 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 6c 56 ac cd 04 Error: UNC at LBA = 0x04cdac56 = 80587862

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 55 70 c3 ad cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 55 68 18 ad cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 ab 60 17 ac cd 40 00 1d+08:05:07.701 READ FPDMA QUEUED
60 ab 60 6c ab cd 40 00 1d+08:05:07.696 READ FPDMA QUEUED
60 00 58 6c aa cd 40 00 1d+08:05:07.696 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% 4376 -
# 2 Short offline Completed without error 00% 4352 -
# 3 Short offline Completed without error 00% 4328 -
# 4 Short offline Completed without error 00% 4305 -
# 5 Short offline Completed without error 00% 4280 -
# 6 Short offline Completed without error 00% 4256 -
# 7 Short offline Completed without error 00% 4232 -
# 8 Short offline Completed without error 00% 4208 -
# 9 Short offline Completed without error 00% 4184 -
#10 Short offline Completed without error 00% 4160 -
#11 Short offline Completed without error 00% 4138 -
#12 Short offline Completed without error 00% 4112 -
#13 Short offline Completed without error 00% 4088 -
#14 Short offline Completed without error 00% 4064 -
#15 Short offline Completed without error 00% 4040 -
#16 Short offline Completed without error 00% 4016 -
#17 Short offline Completed without error 00% 3992 -
#18 Short offline Completed without error 00% 3968 -
#19 Short offline Completed without error 00% 3944 -
#20 Short offline Completed without error 00% 3920 -
#21 Short offline Completed without error 00% 3896 -

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.

 

[William Grzybowski]

So far it looks okay but I would keep my eyes open.

 

[calgarychris]

Thanks William - can you tell if it means there are bad sectors, some sort of permanent damage? How can you tell it looks okay and what would tell me it's about to fail?

Thanks!
Chris

 

[William Grzybowski]

196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0

Those seem to be the most critical... And they tell there are no pending sectors neither uncorrectable, which is good.
I would start worrying when they start increasing...

 

[calgarychris]

Thanks very much - figure I might as well try to learn! :) So, good news and no need to panic just yet...