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It is not enabled and it is not set to mirror to the flash (it is set to Disabled, and mirror setting says No).

I recently had an "unclean shutdown." When I booted one disk was disabled so I removed and added to the array to fix. I am rebuilding my array. I noticed a lot of writes on my USB (6000 in 14 hours) so I rebooted my system. Bad move because now the rebuild has restarted. Now I am 2 hours into a boot with 1000 writes. I am wary because I had a USB drive fail me this month or last after tens of thousands or writes to it. Can anyone tell what is writing to my USB? I have uploaded my diagnostics. I am interested in knowing what to be looking at too (so I can solve this myself next time). tower-diagnostics-20210626-1402.zip

As an update, getting rid of the line I referenced in the custom SMB config did not fix the issue. The Time Machine share still does not show when trying to setup a new time machine backup. edit: after restarting the Mac and mounting the SMB drive I may have fixed this. I will post to be certain. I think it was from removing the SMB config language. I will update to be sure!

Is it safe to pause a parity check then stop the array? Last time I did that the parity check started from scratch. I can try after the parity check completes worst case. I'm running MacOS 11 with the latest patch.

I am having similar problems. What modifications did you remove?

First let me say this previously worked. The only thing I can think of that has changed is I added the following line to my SMB settings: max protocol = SMB2_02. I have a new SMB share (and new Unraid install for that matter). I set export to Yes/Time Machine per the guides to set up Time Machine backup. All of a sudden my (incomplete) backup wasn't working. My Mac couldn't find the disk. I decided to delete the share and start from scratch. Now when I look for a drive to setup a time machine backup my share is not there. I have mounted the SMB share on my Mac so that is not the problem fix. Can someone advise how I can resolve this? Is it the line I added to my SMB settings? I would delete it but for some reason my parity check is running again.