Upgrading to Oracle 12c - Expert Consolidation in Oracle Database 12c - page 423

You could also check if all the required components of the Oracle Restart stack are present. Is there a database
missing? The minimalistic output for Oracle Restart could be similar to this one:
[oracle@server1 ~]$ crsctl stat res -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.DATA.dg
ONLINE ONLINE server1 STABLE
ora.LISTENER.lsnr
ONLINE ONLINE server1 STABLE
ora.RECO.dg
ONLINE ONLINE server1 STABLE
ora.asm
ONLINE ONLINE server1 Started,STABLE
ora.ons
OFFLINE OFFLINE server1 STABLE
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.cssd
1 ONLINE ONLINE server1 STABLE
ora.diskmon
1 OFFLINE OFFLINE STABLE
ora.evmd
1 ONLINE ONLINE server1 STABLE
ora.ora11.db
1 ONLINE ONLINE server1 Open,STABLE
--------------------------------------------------------------------------------
[oracle@server1 admin]$
Unless you specifically configured the Oracle Notification Server (ons) for sending Fast Application Notification
events, this cluster resource will not be started by default. Until all databases on the server are migrated to 12.1 you
need to use the local pre-12c ORACLE_HOME associated with the database to administer it:
[oracle@server1 ~]$ srvctl status database -d ora11
Database is running.
If unsure you can get the ORACLE_HOME from the resource profile (srvctl config database -d) or alternatively
from the /proc file system in /proc/ pid /environ . Can you start and stop the database resource using srvctl? Can you
get the status of the database resource etc.-you get the idea. Please ensure that all your acceptance criteria are met
before proceeding with the database migration.
Using Oracle Restart 12c and previous database releases in parallel
There is no strict dependency between the upgrade of Grid Infrastructure and the RDBMS instances on the same
host. It is perfectly fine to keep pre 12c databases and 12c Grid Infrastructure for a period of time. As with 11.2 there
are some known problems around such a configuration. These are documented in My Oracle Support note 1568834.1