Check HDD
smartctl -a /dev/sdX
Notice: smartmontools package on debian
Output example :
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-53-generic] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
#### START OF INFORMATION SECTION
Model Family: SAMSUNG SpinPoint F1 DT
Device Model: SAMSUNG HD753LJ
Serial Number: S13UJ9BQ902257
LU WWN Device Id: 5 0000f0 007092275
Firmware Version: 1AA01113
User Capacity: 750 156 374 016 bytes [750 GB]
Sector Size: 512 bytes logical/physical
Device is: In smartctl database [for details use: -P show]
ATA Version is: 8
ATA Standard is: ATA-8-ACS revision 3b
Local Time is: Mon Sep 9 13:14:30 2013 CEST
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: (11558) 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: ( 193) minutes.
Conveyance self-test routine
recommended polling time: ( 21) minutes.
SCT capabilities: (0x003f) 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 0x000f 100 100 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0007 075 075 011 Pre-fail Always - 8350
4 Start_Stop_Count 0x0032 097 097 000 Old_age Always - 3535
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 253 253 051 Pre-fail Always - 0
8 Seek_Time_Performance 0x0025 100 100 015 Pre-fail Offline - 0
9 Power_On_Hours 0x0032 098 098 000 Old_age Always - 9646
10 Spin_Retry_Count 0x0033 100 100 051 Pre-fail Always - 0
11 Calibration_Retry_Count 0x0012 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 097 097 000 Old_age Always - 2784
13 Read_Soft_Error_Rate 0x000e 100 100 000 Old_age Always - 0
183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always - 0
184 End-to-End_Error 0x0033 100 100 000 Pre-fail Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Command_Timeout 0x0032 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 077 043 000 Old_age Always - 23 (Min/Max 16/23)
194 Temperature_Celsius 0x0022 072 040 000 Old_age Always - 28 (0 126 28 16)
195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 40329
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x000a 100 100 000 Old_age Always - 0
201 Soft_Read_Error_Rate 0x000a 253 253 000 Old_age Always - 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.
Analyzed: example of the reallocation count:
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
We see that value is 0. That's good, seems there is no damage (data no moved). Moreover WHEN_FAILED column contains - that means never happening.
Check this line also: SMART overall-health self-assessment test result: PASSED
Importance of return code
If the return code echo $? is different than 0, investigate with smartctl -x /dev/sdX
Running long test
smartctl -t long /dev/sdf