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Cannot Mount Database Due To ORA-27072: File I/O error When Control File Is In NFS Storage (Doc ID 2678310.1)

Last updated on APRIL 17, 2023

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2]
Oracle Database - Standard Edition - Version to [Release 11.2]
Information in this document applies to any platform.


The database fails to mount with following errors.


I/O error is raised in the control file which resides on NFS.
Taking strace output of the startup process will show "pread" system call to the control file raising EIO (Input/output error), but there is no ownership or permission problems with the file, and the file can be accessed by the oracle user using "vi" or "strings" command with no errors.



NFS version may have been upgraded.



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