Skip to main content
NetApp Response to Russia-Ukraine Cyber Threat
In response to the recent rise in cyber threat due to the Russian-Ukraine crisis, NetApp is actively monitoring the global security intelligence and updating our cybersecurity measures. We follow U.S. Federal Government guidance and remain on high alert. Customers are encouraged to monitor the Cybersecurity and Infrastructure Security (CISA) website for new information as it develops and remain on high alert.
NetApp Knowledge Base

Why doesn't SCO create a Snapshot on the storage for the db control files ?

Last Updated:


Applies to

SnapCenter Plug-in for Oracle (SCO)


To provide backups in SCO with a less strict storage usage policy compared to SnapManager (SMO/SMSAP), SnapCenter puts a copy of the binary
control files on a datafile filesystem
 for the time of the snapshot, and a backup-to-trace ascii copy in a way that depends on whether or not ASM is used:

  • If NFS or a filesystem LUN formatted with standard Linux filesystem is used, SCO puts the backup-to-trace file with the datafiles
  • If ASM on either NFS or raw LUNs is used, SCO stores the backup-to-trace content in SnapCenter's NSM repository since a text file on ASM is not possible.

Additional Information

  • With Oracle RAC on ASM, it's recommended to backup your NSM database regularly (see Administration Guide on how to do this), since a manual clone or restore under these circumstances is problematic.
  • Snapshot are always created for the database files and archive logs, which are required to be on NetApp storage
  • Snapshot of the redo logs are only created when using DataGuard.


Scan to view the article on your device