Is my disk dying?

Hello everyone,
here is my smartctl output for my main disk, a 500 GB Seagate Momentus 7200.4 mounted on a Dell XPS L702X:
# smartctl -a /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.6-1-ARCH] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Seagate Momentus 7200.4
Device Model: ST9500420AS
Serial Number: 5VJAVT6K
LU WWN Device Id: 5 000c50 02fb10588
Firmware Version: D005SDM1
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 7200 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Sat Dec 28 14:21:34 2013 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
See vendor-specific Attribute list for marginal Attributes.
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: ( 0) 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: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 110) minutes.
Conveyance self-test routine
recommended polling time: ( 3) minutes.
SCT capabilities: (0x103f) SCT Status supported.
SCT Error Recovery Control 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 105 099 006 Pre-fail Always - 8726705
3 Spin_Up_Time 0x0003 100 098 085 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 074 074 020 Old_age Always - 26648
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 069 060 030 Pre-fail Always - 81746848821
9 Power_On_Hours 0x0032 089 089 000 Old_age Always - 10349
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 097 037 020 Old_age Always - 3336
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 100 099 000 Old_age Always - 27
189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 062 044 045 Old_age Always In_the_past 38 (0 4 40 15 0)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 759
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 145
193 Load_Cycle_Count 0x0032 022 022 000 Old_age Always - 156971
194 Temperature_Celsius 0x0022 038 056 000 Old_age Always - 38 (0 6 0 0 0)
195 Hardware_ECC_Recovered 0x001a 047 030 000 Old_age Always - 8726705
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 138723148703285
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 3712562470
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 344080224
254 Free_Fall_Sensor 0x0032 001 001 000 Old_age Always - 114
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 without error 00% 10147 -
# 2 Short offline Completed without error 00% 10145 -
# 3 Extended offline Completed without error 00% 9940 -
# 4 Extended offline Completed without error 00% 9909 -
# 5 Short offline Completed without error 00% 9845 -
# 6 Short offline Completed without error 00% 8440 -
# 7 Short offline Completed without error 00% 2311 -
# 8 Short offline Completed without error 00% 4 -
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.
Is, in your opinion, my disk dying? I am concerned by the pretty high Raw_Read_Error_Rate and Seek_Error_Rate.
Also, I'm asking this because I'm experiencing a *LOT* of segfaults, core dumps and all sort of crashes and system hard freezes, apparently without a precise reason. Here is my other (hopeless) forum request about those problems: link.
I would like to understand if my problems may be related to an imminent disk failure and/or a SATA link failure.
Thanks.

I finished both short and extended SMART tests: according to results, all clear. Here the output of smartctl:
# smartctl -a /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.6-1-ARCH] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Seagate Momentus 7200.4
Device Model: ST9500420AS
Serial Number: 5VJAVT6K
LU WWN Device Id: 5 000c50 02fb10588
Firmware Version: D005SDM1
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 7200 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Sat Dec 28 19:07:14 2013 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
See vendor-specific Attribute list for marginal Attributes.
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: ( 0) 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: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 110) minutes.
Conveyance self-test routine
recommended polling time: ( 3) minutes.
SCT capabilities: (0x103f) SCT Status supported.
SCT Error Recovery Control 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 109 099 006 Pre-fail Always - 21053097
3 Spin_Up_Time 0x0003 100 098 085 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 074 074 020 Old_age Always - 26649
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 069 060 030 Pre-fail Always - 81746898991
9 Power_On_Hours 0x0032 089 089 000 Old_age Always - 10353
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 097 037 020 Old_age Always - 3337
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 100 099 000 Old_age Always - 27
189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 062 044 045 Old_age Always In_the_past 38 (0 4 42 22 0)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 761
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 145
193 Load_Cycle_Count 0x0032 022 022 000 Old_age Always - 157035
194 Temperature_Celsius 0x0022 038 056 000 Old_age Always - 38 (0 6 0 0 0)
195 Hardware_ECC_Recovered 0x001a 029 029 000 Old_age Always - 21053097
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 118515327575609
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 3569731822
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 3979191271
254 Free_Fall_Sensor 0x0032 001 001 000 Old_age Always - 114
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 Extended offline Completed without error 00% 10352 -
# 2 Short offline Completed without error 00% 10350 -
# 3 Short offline Completed without error 00% 10350 -
# 4 Short offline Completed without error 00% 10349 -
# 5 Short offline Completed without error 00% 10147 -
# 6 Short offline Completed without error 00% 10145 -
# 7 Extended offline Completed without error 00% 9940 -
# 8 Extended offline Completed without error 00% 9909 -
# 9 Short offline Completed without error 00% 9845 -
#10 Short offline Completed without error 00% 8440 -
#11 Short offline Completed without error 00% 2311 -
#12 Short offline Completed without error 00% 4 -
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.
What degree of certainty gives me this? What should I try next in my attempt to exclude SATA link and disk failure problems?
Thanks for the insights.

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In future, will I have to perform chkdsk more often ? Defrag ? If yes, at which frequency ?
This is my 3rd laptop dying, Sony VAIO = mothercard dead after 1.2 years, Fujitsu Amilo xi = explosed after 3 years, and now Toshiba HD after 8 months.
From 900EUR up to 1600EUR, I do not see a significative resistance of one of those models, Sony was the badest ever in terms of video card longevity and compatibility (games unplayable after 2 months, no driver update), keyboard "painting" was a mess with deterioration after fews months compared to Fujitsu and Toshiba (no pb). Toshiba L670 more recent, was the best in terms of game compatibility.
What to do ? Stop buying laptop or use it only fews hours a day with a PC on top ?
For time beeing I can't afford to have a PC + a laptop as I am unemployed, surviving with 10EUR/day,
time to find a job again.
Despite this situation, I managed to buy new Zelman notebook cooler for my Toshiba at around 40/50EUR, but, it didn't help apparently.
Tks for feedback about L670 duration life, and particulary HD problem + best use to protect it.
Guillaume

You're not the only one.
I bought an L670 in September last year. It was strictly for home use as replacement for a desktop PC, so it was never moved.
Just after a few weeks things started to go wrong: boot fails, programs crashing, Windows 7 crashing...
It's almost 7 months now since purchase and I'm writing this message on the very same notebook with 'Hard Disk Sentinel' running in the background, reporting more bad sectors every day. It tells me that hard disk health is now down to only 9% and that it has an estimated 14 days to live.
Since the notebook is technically still running fine, I don't think I can have the HDD replaced under warranty or am I wrong? Does the HDD have to cease working alltogether before I can have it replaced under warranty?

Is my disk dying?

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