remotevisitor

"No data" in this case means every sector on the disk contains zeros (so the the parity calculations remain valid when they are removed) in your case you have a file system on the disks showing no files .... the file system structure are data. Also if you used to have files on the drive then the content of the files are almost certainly still there .... it is just the directory entry describing where the file is the was deleted. so an empty file system is not the same as a disk containing just zeros.

If the cache disk is full then for shares set to Cache Yes any new files are written directly to the data disks in the share (not the cache disk) .... mover is not involved in this case.

The process is documented here in the Unraid manual (a link to the manual can be found at the bottom right of the web UI).

I suggest that your revert back to the version of Unraid before you performed the upgrade until you can contact support and get your license issue sorted out.

When you perform a license transfer the old USB drive GID is added to the blacklist built into future versions of Unraid (I cannot change the current version as that version has already been released with a blacklist which does not include your old USB). Therefore the blacklist actually only takes effect when you update to a newer version of Unraid.

Not sure what is going wrong in your case. I notice in your screenshots there is a "+" after their permissions which suggests there are some additional special access permissions such as ACL. Are you possibly using Active Directory on your SMB connection?

If you had a very old version of Unraid on the USB drive (which sounds likely from your description) then the license file will be in the top level of the flash drive rather than in the config folder. Also look for any file ending in ".key" in the top level. if all that fails and you haven’t got license files saved elsewhere (like on the original email which it was sent to you) then you will need to contact support@lime-technology.com with as much details as possible so support can find your license in their records and they can arrange to send a replacement.

For the share in question what is the "minimum free space" setting set to? The setting needs to be a value which is the size of the largest (or larger) file that will be written to the share. If the setting value is too small it will write files to the cache disk that will not fit (resulting in the out of space error you are seeing) rather than writing them to a data disk.

Use the -x option to du

Does the directory "Movies/Police Academy 3 Back in Training (1986)" already exist on a data disk (maybe on one that is very full)? If so then mover will always attempt to move that film to that disk due to the split level setting, whether or not there is enough space on the disk. The split level setting over-rides all other decisions when selecting a disk to write to.

Yes. the steps are more like ... 1. Move data from disk1 to disk2. 2. Put array into maintenance mode. 3. Format disk1 to XFS. 4 Start array. disk1 was never removed from the array so no need to add it back.

Yes. A format will remove any existing files/directories on the drive. So you will need to copy the contents to somewhere else, reformat a drive and then copy the contents back onto the newly formatted drive.

You did have file system corruption and the last run should have fixed it. if you start the array, does the problem directory/file still exist, and if so can you now successfully delete it. It looks like a bunch of files have been recovered into the lost+found directory. Unfortunately they will not have sensible names, so unless you can identify them by their content there isn’t much you can do with them. The question is what caused the file system corruption .... has your system lost power or been force powered off without shutting down in the past? Tha

I suggest checking the file system on that disk to see if the issue is caused by a file system issue: https://wiki.unraid.net/UnRAID_6/Storage_Management#Checking_a_File_System

What is your Settings -> Global Share Settings -> Tunable (support hard links) set to?