About the Rescue Procedure

Note the following before using the rescue procedure:

The rescue procedure can rewrite some or all of the disks in the cell. If this happens, then you might lose all the content of those disks without the possibility of recovery. Ensure that you complete the appropriate preliminary steps before starting the rescue. See "If the Server Has Normal Redundancy" or "If the Server Has High Redundancy".
Use extreme caution when using this procedure, and pay attention to the prompts. Ideally, use the rescue procedure only with assistance from Oracle Support Services, and when you can afford to lose the data on some or all of the disks.
The rescue procedure does not destroy the contents of the data disks or the contents of the data partitions on the system disks, unless you explicitly choose to do so during the rescue procedure.
The rescue procedure restores the storage server software to the same release, including any patches that existed on the server during the last successful boot.
The rescue procedure does not restore these configuration settings:
- Server configurations, such as alert configurations, SMTP information, administrator email address
- ILOM configuration. However, ILOM configurations typically remain undamaged even when the server software fails.
The recovery procedure does restore these configuration settings:
- The network configuration that existed at the end of last successful run of the /usr/local/bin/ipconf utility
- The SSH identities for the server
- The root, celladmin and cellmonitor users
  
  See Also:
  
  Oracle Exadata Storage Server Software User's Guide for information about the ALTER CELL command
The rescue procedure does not examine or reconstruct data disks or data partitions on the system disks. If there is data corruption on the grid disks, then do not use this rescue procedure. Instead, use the rescue procedures for Oracle Database and Oracle ASM.

After a successful rescue, you must reconfigure the server. If you want to preserve the data, then import the cell disks. Otherwise, you must create new cell disks and grid disks.