You should check what server you have: X6270 or X6270 M2
X6270 Docs catalog: https://docs.oracle.com/cd/E19658-01/index.html
Docs for installng OS: https://docs.oracle.com/cd/E19658-01/820-6176-13/index.html
OCFS2 install: https://oracle-base.com/articles/linux/ocfs2-on-linux
I do not know ocfs2 was included at install media SLES 10 or not. It may be problem found installation media for old products.