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Unresponsive during parity check


kavo

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Hi,

 

My box has been going unresponsive when doing a parity check and needing reboot. I deleted alot of the plugins to see if that was the issue and the webgui and a few of the plugins i left on have gone unresponsive but I can still access the shares etc which is new and an improvement.

 

I wonder will the parity check finish and all will be ok? Is this being caused by a faulty disc? its been a hile since a parity check has been completed, that im aware of. if the system goes unresponsive does the parity check still run?

 

Syslog: http://pastebin.com/q3qgUZPF

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  • 2 weeks later...

I am not a true expert on Linux but from what I see, you have had a system crash.  Since there have not been a lot of posts regarding this type of occurrence, I am assuming that you have an issue with your hardware.

 

Two things to look at: 

 

(1) Open the case and make sure that all of the fans are spinning.  Be sure you check to see that PSU fan is running!  Clean out the dust and dirt from any heat sink cooling fins and the inside of the case.  (You probably will want to do this outside of any living area!) 

 

(2) Run a memory test.  As unRAID is booting, you will see an option to run a memory checking program.  Let it run overnight.

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(1) Open the case and make sure that all of the fans are spinning.  Be sure you check to see that PSU fan is running!  Clean out the dust and dirt from any heat sink cooling fins and the inside of the case.  (You probably will want to do this outside of any living area!) 

 

(2) Run a memory test.  As unRAID is booting, you will see an option to run a memory checking program.  Let it run overnight.

(1) found one fan not spinning and one with a few broken fins and and the filters all covered with dust. I've replaced the not spinning fan and will replace the other one when i can get a part. cleaned the PSU.

 

(2) Will do a memtest once I have the other fan

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(1) Open the case and make sure that all of the fans are spinning.  Be sure you check to see that PSU fan is running!  Clean out the dust and dirt from any heat sink cooling fins and the inside of the case.  (You probably will want to do this outside of any living area!) 

 

(2) Run a memory test.  As unRAID is booting, you will see an option to run a memory checking program.  Let it run overnight.

(1) found one fan not spinning and one with a few broken fins and and the filters all covered with dust. I've replaced the not spinning fan and will replace the other one when i can get a part. cleaned the PSU.

 

(2) Will do a memtest once I have the other fan

 

Of one of the fans was the CPU fan, you most likely have found your problem.  Be sure you clean those fins on the CPU heat sink.  Most CPU's will crash if they overheat!  However if the air flow through the case was restricted enough, almost any component could have problems due to overheating.  (Parity are the worst case condition with unRAID for producing heat.) 

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(1) Open the case and make sure that all of the fans are spinning.  Be sure you check to see that PSU fan is running!  Clean out the dust and dirt from any heat sink cooling fins and the inside of the case.  (You probably will want to do this outside of any living area!) 

 

(2) Run a memory test.  As unRAID is booting, you will see an option to run a memory checking program.  Let it run overnight.

(1) found one fan not spinning and one with a few broken fins and and the filters all covered with dust. I've replaced the not spinning fan and will replace the other one when i can get a part. cleaned the PSU.

 

(2) Will do a memtest once I have the other fan

 

Of one of the fans was the CPU fan, you most likely have found your problem.  Be sure you clean those fins on the CPU heat sink.  Most CPU's will crash if they overheat!  However if the air flow through the case was restricted enough, almost any component could have problems due to overheating.  (Parity are the worst case condition with unRAID for producing heat.)

The fan that wasn't spinning was a case fan directly above the cpu. The cpu fan is spinning however it is a small crappy one. This case is quite cramped so if the case fan wasn't spinning it wouldn't matter if the CPU one was as there was no airflow in the case. hopefully this is the problem, but I'll run the memtest and see what it says as well.

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Would a disk read error cause the crash?

 

Jan 23 22:11:42 Box kernel: md: disk2 read error, sector=465597408
Jan 23 22:11:42 Box kernel: md: disk2 read error, sector=465597416

Not likely, but it might be reason for concern anyway. Post a smart report of that drive.

 

Also, did you ever do a memtest?

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Not likely, but it might be reason for concern anyway. Post a smart report of that drive.

 

Also, did you ever do a memtest?

No memtest yet as fans havent arrived yet. I didn't want the box running but my sister was watching tv shows off it while I was away working (I work Fly In Fly Out) so I wont be able to do a mem test until next weekend

 

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.17.4-unRAID] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (AF, SATA 6Gb/s)
Device Model:     WDC WD20EARX-00PASB0
Serial Number:    WD-WCAZAC263964
LU WWN Device Id: 5 0014ee 25bbb2b61
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Jan 24 06:32:03 2015 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:  (0x82)	Offline data collection activity
				was completed without error.
				Auto Offline Data Collection: Enabled.
Self-test execution status:      ( 113)	The previous self-test completed having
				the read element of the test failed.
Total time to complete Offline 
data collection: 		(40200) 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: 	 ( 387) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3035)	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   198   198   051    Pre-fail  Always       -       142816
  3 Spin_Up_Time            0x0027   162   160   021    Pre-fail  Always       -       6900
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       1860
  5 Reallocated_Sector_Ct   0x0033   144   144   140    Pre-fail  Always       -       1076
  7 Seek_Error_Rate         0x002e   100   253   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   070   070   000    Old_age   Always       -       22329
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       -       584
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       478
193 Load_Cycle_Count        0x0032   060   060   000    Old_age   Always       -       420339
194 Temperature_Celsius     0x0022   118   092   000    Old_age   Always       -       32
196 Reallocated_Event_Count 0x0032   099   099   000    Old_age   Always       -       101
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       15
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       12
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       2
200 Multi_Zone_Error_Rate   0x0008   188   188   000    Old_age   Offline      -       3340

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: read failure       10%     22329         447328808
# 2  Short offline       Completed without error       00%      2823         -

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.

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I concur!  I would go so far as to say that you should shut that server off until you get the fans and a new disk to replace that one.  Right now, that disk will have to rebuilt from the parity information and the data on all the remaining disks in the array.  IF you have a problem with another disk, you will lose all the information on this disk! 

 

At this point, you should get the new fans installed and the dust and dirt cleaned out of the case. While you are waiting on a new hard drive, run the memtst (located on the boot menu) for at least 24 hours.  This is long enough to verify that you don't have a memory issue and to make sure that the rest of your computer's hardware (MB and CPU) is OK.  Then, after the new disk gets there, do a preclear on the new disk before you attempt to rebuilt it.

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  • 1 month later...

Almost the same issue which has been plaguing me for nearly 2 months now :-[. That screen shot you posted is almost identical to mine after crash, the variables possibly different..seems to happen more often that not during a parity check, I am currently adding another drive and moving my data whilst converting the drives to xfs one by one... not Co disentangle that this is the problem as the crashes are so very severe in that I can't access anything and even a console session becomes unresponsive not allowing me to make a sys.log dump... would be good if there was a way for unraid to be told to make incremental log dumps at regular intervals so at least I would stand a chance of getting one at the crucial point. If this xfs conversion doesn't resolve the problem then I have to lean toward hardware... not looking forward to that.. my cpu fan is a corsair sealed water cooled unit.... not really possible to easily tell if the pump is working properly....I'll be watching your thread for further info...good luck and I hope your problems get resolved.

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... even a console session becomes unresponsive not allowing me to make a sys.log dump... would be good if there was a way for unraid to be told to make incremental log dumps at regular intervals...

Enter this at the console and let it run

 

tail -f /var/log/syslog >/boot/syslogtail.txt

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