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NFS disks with HEADER_STATUS of UNKNOWN (in V$ASM_DISK) (Doc ID 731412.1)

Last updated on DECEMBER 20, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.1.0.6 [Release 10.1 to 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
This problem can occur on any platform.

Symptoms

ASM does discover NFS disks but no diskgroup can be created with them:

CREATE DISKGROUP DATAGRP3 EXTERNAL REDUNDANCY DISK '/n01/oradata'
*
ERROR at line 1:
ORA-15018: diskgroup cannot be created
ORA-15072: command requires at least 1 failure groups, discovered only 0


From the ASM instance, the NFS devices are been discovered but still these cannot be used to create a diskgroup, even if the NFS device's owner:group and file permissions allow the Oracle software owner to access them (example: oracle:oinstall and 660).

v$ASM_DISK shows for the NFS disk, HEADER_STATUS of UNKNOWN, MOUNT_STATUS of CLOSED, MODE_STATUS of ONLINE and STATE of NORMAL

Using certified NFS storage vendor (in this case, NetApps NFS)

Cause

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In this Document
Symptoms
Cause
Solution
References

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