ORA-04930: open sequence number failed or initial state is valid

admin

ORA-04930: open sequence number failed or initial state is valid
Cause: Either SharedSequence Number OS component was not installed
properly, or an MC hardware failure may have occurred or a previous instance
was not shut down properly.
Action: Verify that there areno background or foreground Oracle processes from
a previous instance on this node using the OS command ps -ef|grep <instance_
name>. Verify that there are no shared memory segments belonging to the user
which owns the Oracle installation by isuing the ipcs -b OS command. If thereare
shared memory segments or processes still on the system, use svrmgrl to
shutdown the instance with the abort option. If the instance is not up, verifythat
the cluster software and/or the hardware is installed and working. Log in as
superuser and issue the cnxshow command. Are all of the nodes in the cluster
listed? Are they members of the cluster? Is the communications between nodes
okay? If the answer to any of these questions is false, contact Digital'scustomer
support organization.