server continues to crash after power outage

[ljflowers90]

Had a power outage last week and everyday my server crashes and my shares disappear 

 

Mar 18 03:40:01 Tower kernel: shfs[3677]: segfault at 0 ip 0000000000403bd6 sp 00001511c7ea5930 error 4 in shfs[403000+c000]

 

i get this error when my shares disappear, unraid is updated to latest version

 

system info:

Model: Custom

M/B: MSI Z170A PC MATE (MS-7971) Version 2.0 - s/n: GA16148359

BIOS: American Megatrends Inc. Version A.A0. Dated: 07/27/2016

CPU: Intel® Core™ i5-6500 CPU @ 3.20GHz

HVM: Enabled

IOMMU: Enabled

Cache: 128 KiB, 128 KiB, 1024 KiB, 6144 KiB

Memory: 16 GiB DDR4 (max. installable capacity 64 GiB)

Network: bond0: fault-tolerance (active-backup), mtu 1500
 eth0: 1000 Mbps, full duplex, mtu 1500

Kernel: Linux 4.19.107-Unraid x86_64

OpenSSL: 1.1.1d

 

[trurl]

Have you done memtest? 

[ljflowers90]

yes

[trurl]

Go to Tools - Diagnostics and attach the complete diagnostics zip file to your NEXT post.

 

Also, setup Syslog Server so you can save your syslog for retrieval after reboot:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=781601

 

[ljflowers90]

heres my server dianostics

tower-diagnostics-20200318-0835.zip

[trurl]

Your cache drive is unmountable. Here is the FAQ for that:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#comment-543490

 

You might wait for further instructions from @johnnie.black but it will probably be a few hours before he sees this.

[JorgeB]

No valid filesystem is being detected on cache, like it was never formatted, that or it was wiped.

[ljflowers90]

39 minutes ago, johnnie.black said:

No valid filesystem is being detected on cache, like it was never formatted, that or it was wiped.

that would cause crashes? it was formatted when i first set the machine up

[JorgeB]

1 hour ago, ljflowers90 said:

that would cause crashes?

Just being unmountable won't cause crashes.

[trurl]

3 hours ago, johnnie.black said:

Just being unmountable won't cause crashes.

No but it might make your user shares disappear since cache is part of the user shares. In your diagnostics, I see that /mnt/user0 is mounted, but /mnt/user isn't.

[JorgeB]

51 minutes ago, trurl said:

No but it might make your user shares disappear since cache is part of the user shares. In your diagnostics, I see that /mnt/user0 is mounted, but /mnt/user isn't.

Since the cache never mounted it should have no direct relation to that, I did notice this segfault in the end of the syslog:

Mar 18 03:40:01 Tower kernel: shfs[3677]: segfault at 0 ip 0000000000403bd6 sp 00001511c7ea5930 error 4 in shfs[403000+c000]
Mar 18 03:40:01 Tower kernel: Code: 89 7d f8 48 89 75 f0 eb 1d 48 8b 55 f0 48 8d 42 01 48 89 45 f0 48 8b 45 f8 48 8d 48 01 48 89 4d f8 0f b6 12 88 10 48 8b 45 f0 <0f> b6 00 84 c0 74 0b 48 8b 45 f0 0f b6 00 3c 2f 75 cd 48 8b 45 f8

This was most likely what cause /mnt/user to go away, but no idea what caused the segfault itself, could be hardware issue or some plugin, if it keeps happening good to run memtest and/or boot in safe mode.

[ljflowers90]

2 hours ago, johnnie.black said:

Since the cache never mounted it should have no direct relation to that, I did notice this segfault in the end of the syslog:

Mar 18 03:40:01 Tower kernel: shfs[3677]: segfault at 0 ip 0000000000403bd6 sp 00001511c7ea5930 error 4 in shfs[403000+c000]
Mar 18 03:40:01 Tower kernel: Code: 89 7d f8 48 89 75 f0 eb 1d 48 8b 55 f0 48 8d 42 01 48 89 45 f0 48 8b 45 f8 48 8d 48 01 48 89 4d f8 0f b6 12 88 10 48 8b 45 f0 <0f> b6 00 84 c0 74 0b 48 8b 45 f0 0f b6 00 3c 2f 75 cd 48 8b 45 f8

This was most likely what cause /mnt/user to go away, but no idea what caused the segfault itself, could be hardware issue or some plugin, if it keeps happening good to run memtest and/or boot in safe mode.

I ended up formatting the cache drive and it’s been up 14 hours no crash, thanks to both of you for all the help 😁

Edited March 19, 2020 by ljflowers90