My disk 1 failed about 6 or 7 weeks ago.  Well I just replaced it a few days ago with  a new Seagate ST4000NM0035.  Pre-clear was fine & added it to my array.  After a successful parity-check, all my little triangles are green.  Everybody's happy, right!  Well I went to save something to a share on disk 1 & now I keep getting 'Disk is write-protected'.  After mucking around a bit, I decide to do a maintenance mode check of disk 1.  I have included the output because I don't even know where to begin.  It is a 4TB drive with 52% utilization.  Thanks in advance for any solutions or input on how to fix this problem

disk1-check.txt

Post diagnostics.

Whoops!  I knew I was forgetting something.

valhalla-diagnostics-20190913-1341.zip

You need to run with --rebuild-tree

So put the array back into maintenance & run the disk check with the command above?

yes, it will take a few hours.

7 hours ago, johnnie.black said:

yes, it will take a few hours.

Thanks, that did the trick!