Data Restore
In the case of data loss due to deletion my mistake the more or less classic scenario was to restore the data from backup tape. Since the access to the backup is limited to the root user a support request has to been filed each time.
With the introduction of the new storage system data can be restored from so called snapshots by the owner himself.
The snapshots are provided for the last 6 days. Restoring older data still requires a support request and a restore from tape.
Backup data on tape are kept for 90 days. Older data can not be restored.