raw device verify

Raw devices for OCR(or any voting, ASM etc), which are shared across RAC cluster nodes.  To confirm if they are same device across all nodes aka all nodes are pointing to same/similar raw device

Check OCR raw devices
./ocrcheck

dd if=/dev/emcpowera1 bs=1024000 count=100 |od -c > /tmp/dd_node1.txt

Run similar commands on all nodes on RAC cluster.

File Size and content should match on all nodes for /tmp/dd_node1.txt.