17 March 2021
I hope you did not remove a disk from an online array.
To delete the DDF you'll have to delete the array on that disk.
I suggest extreme caution, you don't want to delete any arrays with data you may have.
My suggestion, when the unit is not in production, shutdown the Vess properly, then when the unit has powered off, unseat all the drives but that drive you moved that you want to make unconfigured. Then power the Vess back on with just that drive inserted. When it has booted delete any arrays you see, If you use the CLI you can just delete the arrays (any LDs it contains will be deleted too). If you use WebPAM you'll have to delete any logical drives before you delete the array. Then your drive will be unconfigured.
Then do a proper shutdown of the Vess off again, re-insert the rest of the drives and power the Vess back on.
This is the safest way.