What the heck is ocssd.bin?

On a 10.1.0.5 db system we were patching, we saw a process we didn't expect to be running.

[oracle@omsdb:/u01/app/oracle/stage/patch/cpu2007apr/5901877]# ps -ef | grep ora
  oracle   486     1  0   Mar 21 ?        0:03 /u01/app/oracle/product/10.1.0/bin/ocssd.bin
 jmorast 12755 12753  0 10:41:35 ?        0:00 /usr/local/sbin/sshd -R

A slight bit of research reveals the following from Frank Naude.

It appears this process is part of Oracle Cluster Synch Service Daemon, even though RAC and ASM aren't in use.

Solve the immediate issue by running this command from root:

/etc/init.d/init.cssd stop

A permanent fix is to comment out the following line in /etc/inittab and reboot the
server:

h1:35:respawn:/etc/init.d/init.cssd run >/dev/null 2>&1