MinIO / S3 cannot start - Please ensure MinIO binary has write permissions

[snwvru]

I have a Problem with the integrated MinIO Service.

When trying to start the service i see

ERROR Unable to initialize backend: Unable to write to the backend
> Please ensure MinIO binary has write permissions for the backend
HINT:
Use 'sudo chown -R minio /mnt/Storage/s3 && sudo chmod u+rxw /mnt/Storage/s3' to provide sufficient permissions

in /var/log/messages, but the permissions seem to be set correctly

Code:

root@storage[~]# ls -lah /mnt/Storage/s3 
total 13
drwxrwxr-x  2 minio  minio     2B Feb 17 16:44 .
drwxrwx---  9 root   wheel     9B Feb 17 16:44 ..

Can anybody point me, where I should check for other possible problems?