My unraid server decided today to go belly up and put the cache in read only mode.  A number of BTRFS errors are in the log and no amount of rebooting is helping.  Anyone know how I can recover?  I can browse the file structure both in GUI and via command line but locked to read only mode.

 

Attached are diagnostics.  Help please!

nicknas2-diagnostics-20200428-2149.zip

Filesystem is corrupt and best bet is to re-format the pool, if needed see here for some recovery options.

Filesystem is corrupt and best bet is to re-format the pool, if needed see here for some recovery options.

Thanks johnnie, I did end up copying off most of my data. Only thing that was corrupt was appdata folder which I backup regularly to the array.

Saw some info that BTRFS corruption is usually due to memory issue but I’ve been running a memtest now for almost 48 hours and all clean. Any idea what would have triggered the corruption? System was operating normally and then poof docker crashed and cache was locked to read only.


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It's difficult to say especially when it's a one time thing, but if it keeps happening there's likely some hardware issue.