On 11/13/2012 09:54 PM, Steven Rostedt wrote:
Hi Jens,

Since you helped me out before, I'm going to ask for some more help ;-)

I just recently purchased a new workstation from HP, and after fighting
with getting grub2 working the way I want, I kicked off a ktest run to
create a true min config. It basically disables options from the .config
file until it finds a .config that that boots but will fail if you
disable any of the configs that are set.

Anyway, in the middle of this test, I started getting these nasty ata
errors again (like the ones I got with the failed HD that you helped me
out with on G+). But this is a brand new spanking machine (with a new
HD), but I could have gotten a lemon.

Anyway, the full dmesg is at:

http://rostedt.homelinux.com/private/bxtest-ata-fail-dmesg

The important part being:

[   11.974811] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
[   11.982816] ata1.00: irq_stat 0x40000008
[   11.987512] ata1.00: failed command: READ FPDMA QUEUED
[ 11.993407] ata1.00: cmd 60/08:00:00:20:92/00:00:07:00:00/40 tag 0 ncq 4096 in [ 11.993407] res 41/40:00:04:20:92/00:00:07:00:00/40 Emask 0x409 (media error) <F>
[   12.010367] ata1.00: status: { DRDY ERR }
[   12.015146] ata1.00: error: { UNC }

..

[   16.527065] end_request: I/O error, dev sda, sector 127016964

i.e. the drive reported an uncorrected read error on sector 127016964.


And here's a smartctl dump:

[root@bxtest ~]# smartctl --all /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-3.5.5-custom] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Blue Serial ATA
Device Model:     WDC WD5000AAKX-60U6AA0
Serial Number:    WD-WCC2EF801545
LU WWN Device Id: 5 0014ee 25ccb70a0
Firmware Version: 18.01H18
User Capacity:    500,107,862,016 bytes [500 GB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Tue Nov 13 17:48:40 2012 EST
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:  (0x80) Offline data collection activity
                                        was never started.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      (  40) The self-test routine was interrupted
                                        by the host with a hard or soft reset.
Total time to complete Offline
data collection:                ( 7860) 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:        (   2) minutes.
Extended self-test routine
recommended polling time:        (  80) minutes.
SCT capabilities:              (0x303f) 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     0x002f   200   200   051    Pre-fail  Always       
-       78
   3 Spin_Up_Time            0x0027   143   142   021    Pre-fail  Always       
-       3850
   4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       
-       138
   5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       
-       0
   7 Seek_Error_Rate         0x002f   100   253   051    Pre-fail  Always       
-       0
   9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       
-       43
  10 Spin_Retry_Count        0x0033   100   100   051    Pre-fail  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       
-       136
184 End-to-End_Error        0x0033   100   100   097    Pre-fail  Always       
-       0
187 Reported_Uncorrect      0x0032   022   022   000    Old_age   Always       
-       78
188 Command_Timeout         0x0032   094   094   000    Old_age   Always       
-       6
190 Airflow_Temperature_Cel 0x0022   074   067   040    Old_age   Always       
-       26 (Min/Max 26/27)
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       
-       123
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       
-       14
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       
-       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       
-       1

So it looks like the drive reports there's 1 sector that will be reallocated once it gets rewritten. It could be that the drive is actually OK but that sector just got mis-written (due to a hard power-off while it was being written, perhaps) and will be fine once it gets written successfully.

You could try using hdparm commands to overwrite that sector, or just boot from a live CD, zero out the entire disk with "dd if=/dev/zero of=/dev/sda" and try a reinstall. If the drives go away and a long SMART self test reports no errors, the drive is likely OK. If not, a replacement is likely in order.

198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      
-       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       
-       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   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    Interrupted (host reset)      80%         1         -

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.

[root@bxtest ~]#


Any help would be appreciated. Is this HD a lemon (need to return it?)
or did something else go wrong that is fixable.

Thanks!

-- Steve


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