Trying to figure out how to proceed and diagnose APFS problem
Today my MacPro started to reset the audio volume to minimum repeatedly,
so I tried to reset the NVRAM. After that, the computer would start up
but nothing would appear on the monitor, and in about 3-5 minutes it
would shut itself down. So I booted into Recovery and ran Disk Utility
to repair the startup disk. I received the dreaded "fs root tree is invalid" message. Because I have good CCC and Backblaze backups, I chose to re-install Mojave. I restarted and things seemed to be working OK, but I was getting a lot of spinning beachballs where they didn't used to appear. I ran Disk Utility and received this message:
Repairing file system
Volume was successfully unmounted
Can't repair volume because other APFS Volumes in its Container are mounted. Unmount them, or perform a repair while running from another macOS system (such as the Recovery System.)
Restoring the original state found as mounted.
Unable to unmount volume for repair.
Operation failed...
This is a little concerning. I am trying to decide whether this is a hardware and/or software issue and how to treat after diagnosis. I thought that re-installing Mojave would have fixed this, but it does not appear to have done so.
Thanks!
Mac Pro, macOS 10.14