Backup on the default location on my master node.
We can define another backup location for the automatic backups as well as for the manual backups –
preferrable on a Shared raw device that is accessible by all the nodes

[root]# /u01/11.2.0/grid/bin/ocrconfig -showbackup

orcl1-db1-ec 2014/11/05 14:06:55 /u01/11.2.0/grid/cdata/ec/backup00.ocr

orcl1-db1-ec 2014/11/05 10:06:55 /u01/11.2.0/grid/cdata/ec/backup01.ocr

orcl1-db1-ec 2014/11/05 06:06:55 /u01/11.2.0/grid/cdata/ec/backup02.ocr

orcl1-db1-ec 2014/11/04 06:06:53 /u01/11.2.0/grid/cdata/ec/day.ocecr

orcl1-db1-ec 2014/10/28 02:06:38 /u01/11.2.0/grid/cdata/ec/week.ocr
PROT-25: Manual backups for the Oracle Cluster Registry are not available

http://uhesse.com/2010/10/06/voting-disk-and-ocr-in-11gr2-some-changes/