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[6.5.3] Server hanging (kernel panic) monthly-ish


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I am trying to troubleshoot my server it seems to be hanging after about 30 to 45 days of flawless working. This issue initially started around 2017 September. I have tried various UNRAID updates and replaced hardware such as NIC, SATA Drive and GPU. I have looked at logs and stats during and after the 30 to 45 day before crash and found nothing out of the ordinary. For the most recent kernel panic, I have collected logs using plugin Fix Common Problem and attached the logs with this post. Here are the following things I have done to narrow this fault down:


1) Performed  multiple memtest for 24+ hours without errors.

2) Performed xfs filesystem check with -nv (please find the results attached). I think the results are good but I could be wrong.

3) Performed btrfs scrub on my cache pool with no errors.


I am not sure at this point what is causing it to hang such unpredictably. Unfortunately I don't have the kernel panic screenshot for this particular instance since I am out of town. However, I have attached a couple from the last 2 failures. The screenshots are from March and May.


Unfortunately, I am out of town till August 30th. Hence, I wont have physical access to my server but I will be able to remotely collect and perform most diagnostic tasks. 


Any help regarding this would be awesome :)  


M/B: MSI - Z97 PC Mate(MS-7850)
CPU: Intel® Core™ i7-4790 CPU @ 3.60GHz
HVM: Enabled
IOMMU: Enabled
Cache: 256 kB, 1024 kB, 8192 kB
Memory: 24 GB (max. installable capacity 32 GB)
Network: bond0: IEEE 802.3ad Dynamic link aggregation, mtu 1500 
 eth0: 1000 Mb/s, full duplex, mtu 1500 
 eth1: 1000 Mb/s, full duplex, mtu 1500
PARITY: 8TB Seagate
DISK1: 4TB Seagate
DISK2: 4TB Seagate
DISK3: 8TB Seagate
DISK4: 4TB Seagate
CACHE: 240GB Intel 
CACHE1: 256GB Samsung pro
CACHE2: 256GB Samsung pro












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