Skip to main content
NetApp Knowledge Base

RAConeNode DB Backup fails on SCO with "Preferred hosts are not found" after discovery

Last Updated:

Applies to

  • SnapCenter Plug-in for Oracle (SCO) 4.x
  • Oracle Real Application Cluster (RAC)


Every Oracle RAC based Database registered in SnapCenter, even in a RAConeNode configuration, refers to a Host Group instead of a single Host reference.
To allow for a host to be in maintenance, it's possible to select  preferred hosts for the backup to go through in case of a host being offline or in maintenance.
However, if the Host Group ends up with only a single Host entry by changing a multi-node RAC Database into a RACOneNode database, and the preferred host list only contained one node, it is nolonger selected for the right host during initial discovery, and the backup fail:

ERROR: Job Failed:

Preferred hosts are not found or could be in maintenance mode. Configure preferences for resource


Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.