For 11G and 12G PowerEdge systems, the backup and restore methods have an optional parameter to enter a passphrase. If a passphrase is used, it must be correctly entered in order for the restore operation to be successful. Passphrases shall be validated against the following rules:
1. Must be 8-32 characters in length
2. Must contain 1 Uppercase letter
3. Must contain 1 Lowercase letter
4. Must contain 1 Number
5. Must contain 1 Special character
See more about Lifecycle Controller (LC), here.
See more about Backup and Restore in the LC Best Practice Guide, here.