Which two statements are true about the X5 Exadata storage server rescue procedure? 

Answer options:

A. The rescue procedure can be executed from the CELLBOOT USB flash drive.
B. An Exadata storage server automatically enters the rescue environment when it cannot boot from the system area.
C. The rescue procedure can be used to repair corruption in an ASM diskgroup.
D. The rescue procedure can be used to restore a corrupt system area.
E. The rescue procedure must be used to recover from a failed Exadata storage server software upgrade.

AD

The rescue procedure is necessary when system disks fail, the operating system has a corrupt file system, or there was damage to the boot area. If only one system disk fails, then use CellCLI commands to recover. In the rare event that both system disks fail simultaneously, you must use the Exadata Storage Server rescue functionality provided on the Oracle Exadata Storage Server Software CELLBOOT USB flash drive. References: http://docs.oracle.com/cd/E80920_01/DBMMN/maintaining-exadata-storage-servers.htm#GUID-710814E7-4691-49EE-95AD-726D2D6C5BFE