NFS disks with HEADER_STATUS of UNKNOWN (in V$ASM_DISK)
(Doc ID 731412.1)
Last updated on DECEMBER 20, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.1.0.2 to 188.8.131.52 [Release 10.1 to 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
This problem can occur on any platform.
CREATE DISKGROUP DATAGRP3 EXTERNAL REDUNDANCY DISK '/n01/oradata'
ERROR at line 1:
ORA-15018: diskgroup cannot be created
ORA-15072: command requires at least 1 failure groups, discovered only 0
From the ASM instance, the NFS devices are been discovered but still these cannot be used to create a diskgroup, even if the NFS device's owner:group and file permissions allow the Oracle software owner to access them (example: oracle:oinstall and 660).
v$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)
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