[Ubuntu-users] fsck shows errors on main partition only when mounted

[Berni Elbourn]

K. Frank wrote:

> Again, are these real errors, and if so, how might I fix them?
> (And, if not, for my education, what is going on here.)

Others have answered the fsck thing. An answer to this question is to 
look at the internal disk error status. Drop to a shell and try this 
command "sudo smartctl -a /dev/sda"

ref: http://sourceforge.net/apps/trac/smartmontools/wiki/TocDoc

Berni

PS: A good disk looks something like this YMMV.

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 ===
Device Model:     WDC WD10EADS-65M2B0
Serial Number:    WD-WMAV50980268
Firmware Version: 01.00A01
User Capacity:    1,000,204,886,016 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Wed Nov 17 09:54:40 2010 GMT
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:  (0x84)	Offline data collection activity
					was suspended by an interrupting command from host.
					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: 		 (19560) 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: 	 ( 226) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3037)	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     0x002f   200   200   051    Pre-fail 
Always       -       0
   3 Spin_Up_Time            0x0027   115   109   021    Pre-fail 
Always       -       7208
   4 Start_Stop_Count        0x0032   100   100   000    Old_age 
Always       -       122
   5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail 
Always       -       0
   7 Seek_Error_Rate         0x002e   200   200   000    Old_age 
Always       -       0
   9 Power_On_Hours          0x0032   094   094   000    Old_age 
Always       -       5020
  10 Spin_Retry_Count        0x0032   100   100   000    Old_age 
Always       -       0
  11 Calibration_Retry_Count 0x0032   100   100   000    Old_age 
Always       -       0
  12 Power_Cycle_Count       0x0032   100   100   000    Old_age 
Always       -       121
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always 
       -       11
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always 
       -       302035
194 Temperature_Celsius     0x0022   122   109   000    Old_age   Always 
       -       25
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always 
       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always 
       -       0
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age 
Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always 
       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age 
Offline      -       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.
If Selective self-test is pending on power-up, resume after 0 minute delay