Getting Below error while starting instance.
[oracle@uidl1-oratest-01 ~]$srvctl start instance -d mda -i mda1
PRCR-1013 : Failed to start resource ora.mda.db
PRCR-1064 : Failed to start resource ora.mda.db on node uidl1-oratest-01
CRS-5017: The resource action "ora.mda.db start" encountered the following error:
ORA-01078: failure in processing system parameters
ORA-01565: error in identifying file '+DATADG001/mda/spfilemda.ora'
ORA-17503: ksfdopn:2 Failed to open file +DATADG001/mda/spfilemda.ora
ORA-27140: attach to post/wait facility failed
ORA-27300: OS system dependent operation:invalid_egid failed with status: 1
ORA-27301: OS failure message: Operation not permitted
ORA-27302: failure occurred at: skgpwinit6
ORA-27303: additional information: startup egid = 1000 (oinstall), current egid = 1001 (dba)
CRS-2674: Start of 'ora.mda.db' on 'uidl1-oratest-01' failed
Use SQL*Plus to logon to the ASM instance and list the devices for the DATADG00 diskgroup.
Are all the disks and failgroups available?
From the root error OS failure message: Operation not permitted, it seems that ASM/Oracle does not have read/write access to a specific disk in the diskgroup. The error also reports differences in current and expected group identifiers - oinstall vs. dba.
What Oracle version do you have installed? On what o/s? Are Grid and RAC separated at o/s user level as recommended? What is the default group for the oracle o/s user? What is the group ownership of the disks/devices used by ASM for that diskgroup?