JohnMC

Can confirm (Not sure why i never responded to Christopher but the disks got a fresh format before being added to the pool.) I don't remember what i had done before but i fixed the issue for existing files and folders, probably by reapplying inherited permissions for the objects within the drive instead of on the drive itself. Adding new folders had the same issue but doing as DrParis stated will fix it for good it looks like. For anyone reading this and not knowing what DrParis is describing: From "Computer"/"MyComputer" right click on the DrivePool drive and select properties. Click the "Security" tab. Click the "Advanced" button at the bottom. Click "Change Permissions...". Check the box that says "Replace all child object permissions with inheritable permissions from this object" Press apply (might take some time to apply) This will make all the files and folders in the drive (current and future) take the same permissions of the drive itself. If something is wrong with the permissions of the drive this might not fix the issue or might cause other issues. If you like, check and make sure that at least "System" and "Administrators" have full control.

I'm currently evaluating drive pool before i purchase it and although i like it so far, it did make me nervous running in to this same problem/error as OP. Even newly created folders in the pool drive generate this error when opening the security settings. I checked all the drives in the pool (and the "PoolPart.???" folder) and they all have matching 'default' security settings. All drives in the pool were freshly formatted when added to the pool but one drive was added later after the initial pool creation. The permissions for the pool virtual drive seem to be default/normal but the permissions of the folders in the pool drive have strange duplicated permissions. I obviously didn't assign any permissions specific to this folder. Last relevant information would be that i am using the regular pool protection/duplication.