OCRCHECK utility

1.What is an OCRCHECK utility?

An ocrcheck utility is a diagnostic tool used for diagnosing OCR(Oracle Cluster Registry) Problems. This is used to verify the Oracle Cluster Registry(OCR) integrity.

2.What does an ocrcheck display?

The OCRCHECK utility displays the version of the OCR’s block format, total space available and used space, OCRID, and the OCR locations that we have configured.

3.How does ocrcheck perform integrity check?

OCRCHECK performs a block-by-block checksum operation for all of the blocks in all of the OCRs that we have configured. It also returns an individual status for each file as well as a result for the overall OCR integrity check.

4.Give a sample output of ocrcheck utility:-
Sample of the OCRCHECK utility output:

Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 262144
Used space (kbytes) : 16256
Available space (kbytes) : 245888
ID : 1918913332
Device/File Name : /dev/raw/raw1
Device/File integrity check succeeded
Device/File Name : /dev/raw/raw2
Device/File integrity check succeeded
Cluster registry integrity check succeeded

5.Where does an ocrcheck utility create a log file?

OCRCHECK creates a log file in the directory
CRS_home/log/hostname/client.

6.How can we change the amount of logging?
To change amount of logging, edit the file
CRS_home/srvm/admin/ocrlog.ini.

LABELS: OCRCHECK UTILITY

{orclprd001}/home/oracle$ ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 261916
Used space (kbytes) : 24276
Available space (kbytes) : 237640
ID : 1338974581
Device/File Name : /dev/p2_ocrdisk_1
Device/File integrity check succeeded
Device/File Name : /dev/p3_ocrdisk_1
Device/File integrity check succeeded

Cluster registry integrity check succeeded