After some disk and a instance of RAC lost, the database was stuck with ORA-15081.
A recover was needed. #StayTheTip
dbsrvr:/home/oracle>sqlplus / as sysdba SQL*Plus: Release 18.104.22.168.0 Production on Fri Jun 29 19:51:37 2015 Copyright (c) 1982, 2010, Oracle. All rights reserved. Connected to an idle instance. SQL> startup mount; ORACLE instance started. Total System Global Area 1.3462E+10 bytes Fixed Size 2239232 bytes Variable Size 7214204160 bytes Database Buffers 6241124352 bytes Redo Buffers 4489216 bytes Database mounted. SQL> alter database open; alter database open * ERROR at line 1: ORA-15081: failed to submit an I/O operation to a disk
SQL> recover database; Media recovery complete. SQL> alter database open; Database altered.
Be happy with this! 😀