In Oracle® Clusterware Administration and Deployment Guide 11g Release 2 (11.2), the section, Troubleshooting Oracle Cluster Registry and Diagnostic Output, says that:
This section describes various methods for troubleshooting problems with OCR, and obtaining diagnostic information from the utilities used to manage the OCR. You can use these utilities to troubleshoot OLR.
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Troubleshooting Oracle Cluster Registry
Table 2-5 describes common OCR problems with corresponding resolution suggestions.
Using the OCRCHECK Utility
The OCRCHECK utility displays the version of the OCR's block format, total space available and used space, OCRID, and the OCR locations that you have configured. OCRCHECK performs a block-by-block checksum operation for all of the blocks in all of the OCRs that you have configured. It also returns an individual status for each file and a result for the overall OCR integrity check.
You can run the ocrcheck -help command to display usage information about this utility.
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Note:
The logical corruption check is only performed if you run the ocrcheck command as root.