Parity check, woke up to a shut down array

[tucansam]

Yesterday's parity check was running fine when I went to bed.

 

Woke up this morning to a server that was running, but whose array had been shut down.  Parity check bubble in the upper right corner of the browser window said it completed with errors, but couldn't give me specifics.  I entered my passphrase and started the array, which took a really long time to come online.  Now another (automated, I assume due to an unclean shutdown?) parity check has begun.

 

Diags attached.

 

sat_ffs2-diagnostics-20211218-0827.zip

[itimpi]

Sounds as if you have a hardware error as Unraid should never restart on its own.   I would suspect power or cooling.  If you want diagnostics that survive a restart then you should set up the syslog server.