You should turn off the auto mount on the drive. It's trying to mount and has errors. I'm not sure if the errors are keeping the disk partition from being deleted. Try doing a repair with UD. Click on the four squares when the disk is not mounted.
Just updated CA and see this in the plugin installation:
plugin: skipping: ca-tooltipster.txz - unRAID version too high, requires at most version 6.3.2
Is this an issue?
I have no problem deleting a partition.
It is unrealistic to show a snippet of the log and expect that I can find your issue. There is something unique to your situation and the only way I can help is for you to post your diagnostics. No diagnostics, no help!
Why are you trying to mount the drive if you're going to format it? Just delete the partition and re-format it. The drive has file errors and won't mount.
Do you have any dockers? If you do, they will need some processing power.
You can multiple assign CPUs to several VMs. I do that with two Windows desktop VMs.
If I understand you correctly, you can go to the UD page and click the help button. The help describes how to use the UD script to mount and unmount disks.
The latest Docker will install ownCloud 10.0.6 on the first install, but it will not upgrade an existing installation to 10.0.6. You need to use the webgui updater, or do a manual update.
Updated Docker will now create your crontab entries. Read the first post on how to create a 'cron' file and have the Docker create your crontab entries when it starts.
You have an extremely old version of UD - 'unassigned.devices.plg - 2015.09.28b'. Please update.
Also remove these plugins:
preclear.disk.plg - 2017.09.27
statistics.sender.plg - 2017.06.22
You should also move these plugins to Dockers:
Couchpotato.plg - 2016.09.17.1
Sabnzbd.plg - 2016.11.29.1
Sickbeard.plg - 2016.09.17.1
Install the Community Applications plugin.
EDIT: Watch this video on some essential plugins: