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RMAN backup to NFS fails with ORA-19504 on 12.2 DB with DNFS is enabled (Doc ID 2447675.1)

Last updated on APRIL 17, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


NOTE: In the images and/or the document content below, the user information and environment data used represents fictitious data from the Oracle sample schema(s), Public Documentation delivered with an Oracle database product or other training material. Any similarity to actual environments, actual persons, living or dead, is purely coincidental and not intended in any manner.

For the purposes of this document, the following fictitious environment is used as an example to describe the procedure:

Database Name: ORCL1220
Sample Locations: /mnt/rman1/, exax6rman1/
Unix username:  nfsnobody


On 12.2 DB with DNFS is enabled, RMAN uses NFS mounted directory to store backup files.

When recreated directory on NFS server and then remounted with the same directory name and the same mount options, ORA-19504 occurs and RMAN backup fails.

Below is the steps used to reproduce this issue.

Please note in the example below IP address of NFS server will be changed to XX.XX.XX.XXX.

1.Check mount directory.



 Recreate directory or volume on NFS server, remount on NFS client and run RMAN backup again.  


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