Backup after upgraded ECC 6.0.0 to 6.0.4

Question:
Upgrade on ECC 6.0 0. After successfully upgrade, but unfortunately backup is not possible. Backup was still possible before upgrade. Error on backup log from DB13.
tape. hdr0, I/O-Error.

Solution:
If you are experienced error and cannot create <.tape.hdr0> (errno:13).tape.hdr0 10 blocks
Please check and make sure the permissions of BR*Tools have been setup correctly as per SAP OSS Note #113747.