VDB Provision Fails with "WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard," when Target Is HP-UX (KBA11170)

Issue

When provisioning an Oracle VDB to a target running HP-UX the job can fail with the following Oracle error:

WARNING:NFS file system /mnt/delphix/<VDB>/datafile mounted with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
2024-05-29T10:06:28.712728+02:00
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/mnt/delphix/<VDB>/<VDB>_control_1.ctl'
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options

Applicable Delphix Versions

Click here to view the versions of the Delphix engine to which this article applies

Date	Release
Jun 20, 2024	24.0.0.0
May 22, 2024	23.0.0.0
Apr 17, 2024 | May 8, 2024	22.0.0.0 | 22.0.0.1
Mar 20, 2024 | Apr 2, 2024	21.0.0.0 | 21.0.0.1
Feb 21, 2024	20.0.0.0
Jan 25, 2024	19.0.0.0
Dec 20, 2023 | Jan 10, 2024	18.0.0.0 | 18.0.0.1
Nov 21, 2023	17.0.0.0
Oct 18, 2023	16.0.0.0
Sep 21, 2023	15.0.0.0
Aug 24, 2023	14.0.0.0
Jul 24, 2023	13.0.0.0
Jun 21, 2023	12.0.0.0
May 25, 2023	11.0.0.0
Apr 13, 2023	10.0.0.0 | 10.0.0.1
Mar 13, 2023 | Mar 20, 2023	9.0.0.0 | 9.0.0.1
Feb 13, 2023	8.0.0.0
Jan 12, 2023	7.0.0.0
Releases Prior to 2023
Major Release	All Sub Releases
6.0	6.0.7.0, 6.0.8.0, 6.0.8.1, 6.0.9.0, 6.0.10.0, 6.0.10.1, 6.0.11.0, 6.0.12.0, 6.0.12.1, 6.0.13.0, 6.0.13.1, 6.0.14.0, 6.0.15.0, 6.0.16.0, 6.0.17.0, 6.0.17.1, 6.0.17.2

Resolution

To resolve this issue, either back out the latest patch set or switch to using Oracle DNFS.

Troubleshooting

The issue is caused by an unknown HP-UX patch that changes the behaviour of the data captured in the /etc/mnttab file. Oracle parses this file to check for the mount options 

rsize>=32768 & wsize>=32768

An example looks similar to the following:

cat /etc/mnttab | grep <VDB>
##.##.#.#:/domain0/group-#/oracle_db_container-###/oracle_timeflow-### /mnt/delphix/<VDB>/ nfs nosuid, noints, forcedirectio, NFSv3, dev=4007940 0 0 1717757917

After patching, these entires are no longer recorded in the /etc/mnttab file, and so Oracle interprets them as not set.

If you run the following command

nfsstat -m 
/mnt/delphix/<VDB>/temp from ##.##.#.#:/domain0/group-#/oracle_db_container-###/oracle_timeflow-###/temp Flags: vers=3, proto=tcp, sec=sys, hard, nointr, forcedirectio, link, symlink, acl, devs, rsize=32768,wsize=32768, retrans=5, timeo=600

you will see that the options are in place on the mount.

 

 

 

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