Check Linux HDD before Failure

Some people blame that their server hard disk failure or bad sector. Actually can prevent this happen. You must understand the S.M.A.R.T that provide some informations in your hard disk. If any Raw Read Error Rate data is not 0 or more than 0, I suggest you change the hard disk now to prevent the hard disk failure. This is the alarm from the hard disk, but a lot of users never know about it.

In Linux, you could use smartctl that can be download in
http://smartmontools.sourceforge.net/

Follow their instruction, after install, then run

./smartctl --all /dev/sda

if you are using SATA, if you have more HDD, you could try
sda1 sda2 . . .

Here is the out put from the software.
[[email protected] smartmontools-5.38]# ./smartctl --all /dev/sda
smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Model Family: Western Digital Caviar SE Serial ATA family
Device Model: WDC WD800JD-75MSA3
Serial Number: WD-WMAM9WH13157
Firmware Version: 10.01E04
User Capacity: 80,000,000,000 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 Aug 22 15:07:36 2010 MYT
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: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (2460) 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: ( 33) minutes.
Conveyance self-test routine
recommended polling time: ( 6) minutes.
SCT capabilities: (0x103f) SCT Status 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 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 166 166 021 Pre-fail Always - 2691
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 28
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0
9 Power_On_Hours 0x0032 068 068 000 Old_age Always - 24034
10 Spin_Retry_Count 0x0013 100 253 051 Pre-fail Always - 0
11 Calibration_Retry_Count 0x0012 100 253 051 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 28
190 Airflow_Temperature_Cel 0x0022 080 059 045 Old_age Always - 20
194 Temperature_Celsius 0x0022 123 102 000 Old_age Always - 20
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 200 200 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0009 200 200 051 Pre-fail Offline - 0

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% 0 -
# 2 Short offline Completed without error 00% 0 -

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.

[[email protected] smartmontools-5.38]#

You could see
1 Raw_Read_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0
197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0
7 Seek_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0


If 3 of them are not displaying 0, I suggest you backup and change the HDD now.


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