You are concerned about how to recover from a failed Exadata Storage Server. What is the best
way to recover from a storage cell failure when content in both system disks is lost?
A.
Database Machine Administrators should be prepared by creating a backup using
dbserver_backup.sh.
B.
Database Machine Administrators should be prepared by creating a backup to an NFS file
location as described in the owners guide.
C.
Any USB can be plugged in to create a backup.
D.
Be sure that you have a backup by running make_cellboot_usb.sh in /opt/oracle.cellos.
E.
Use the Exadata Storage Server rescue functionality that Is provided on the CELLBOOT USB
flash drive.
F.
Re-imaging the cell is the only option.
Explanation:
Recovering Storage Cells from Loss of a System Volume Using CELLBOOT
Rescue
Problem
You have either corrupted your system volume images or suffered from simultaneous loss of the
first two disk drives in your Exadata storage cell, and you wish to use the internal CELLBOOT
USB drive to recover from failure.
Solution
At a high level, these are the steps you should take:
* Understand the scope of the failure
* Contact Oracle Support and open a Service Request
* Boot your system from the internal CELLBOOT USB image
* Recover your storage cell using the cell rescue procedure
* Perform post-recovery steps and validation
E
Ans is E
Using the Oracle Exadata Storage Server Software Rescue Procedure
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.
E:
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.