Hello,

I've had this disk from an old configuration, Disk 8. Before adding to my array I cleared the disk of all partitions and formatted it to XFS. I mounted it and checked that it had no files inside and no errors in the log. I unmounted it then stopped my array and added disk 8 to the array. It took 18 hours to clear the disk and afterward, I was left with good old "FS: Auto Unoumountable: Unsupported file system" as pictured below. Usually, this gets resolved if the disk get reformatted but that option is not available (no check mark). I restarted the server and stopped and started the array; none helped. 

 

I've attached diagnostics and would appreciate some help

Thank you 

brooklyn-diagnostics-20241004-1547.zip

Just Solved the problem for anyone wondering.....

 

I stopped the array and removed disk 8 from the array so it showed up in unassigned devices. If there is an 'x' on the drive allowing you to clear the disk, click that. Otherwise, go to the terminal and use fdisk /dev/sdX, where X is your drive. Then enter d to delete any partition, and enter w to write the results. After this, your disk should be available to format under unassigned devices. Click "Format" (it may work immediately or may prompt you to enable destructive mode under the unassigned devices settings). Enable destructive mode, and you can now format your disk to XFS. Then add the disk back to the array.

Note that the file system might be set to "auto," so be sure to click on the disk, go to disk settings, and set the file system to XFS to match the format you applied to the drive. Start the array, and that should resolve the unmountability issue you experienced before.