Oracle Cluster Registry Location to be Added is not Accessible

APPLIES TO:

Oracle Server - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.

GOAL

This note is to list OCR storage requirement and to provide location of diagnostic information if PROT-30 is reported.

FIX

OCR Storage Requirement:

A. If located on shared file system:

A1. At least 280 MB of free space is required for each OCR volume as per the following documentation:

Oracle Grid Infrastructure Installation Guide
11g Release 2 (11.2)

Verify System Requirements

A2. Shared file systems must be mounted on all nodes before you can place OCR on them.

B. If located on ASM:

B1. The space requirement is slightly different depend on diskgroup redundance level, refer to the following documentation for details:

Oracle Grid Infrastructure Installation Guide
11g Release 2 (11.2)

Verify System Requirements

For External redundancy:  The space requirement for the OCR is:  300MB
For Normal redundancy:  The space requirement for the OCR is:  600MB
For High redundancy:  The space requirement for the OCR is:  900MB

B2. The diskgroup intended for OCR must be mounted on all nodes

B3. Compatible.asm setting for diskgroup must be at least 11.2

B4. oracle binary in <GRID_HOME> must have permission of "6751" or "-rwsr-s--x" on all nodes.

Diagnostic information:

If ocrconfig still reports the error after requirement is met, please refer to following for traces:

A. $GRID_HOME/log/$HOST/crsd/crsd.log; example:

2010-01-25 11:11:12.374: [  OCRASM][1291008320]proprasmo: Error in open/create file in dg [DG1]
[  OCRASM][1291008320]SLOS : SLOS: cat=8, opn=kgfoCr2P01, dep=15056, loc=kgfokge
ORA-17502: ksfdcre:4 Failed to create file +DG1.255.1
ORA-15221: ASM operation requires compatible.asm of 11.1.0.0.0 or higher
ORA-06512: at line 4

B. $GRID_HOME/log/$HOST/client/ocrconfig_pid.log; example:

Oracle Database 11g Clusterware Release 11.2.0.1.0 - Production Copyright 1996, 2009 Oracle. All rights reserved.
2010-01-25 11:11:11.088: [ OCRCONF][2151603648]ocrconfig starts...
2010-01-25 11:11:12.571: [  OCRCLI][2151603648]proac_replace_dev:[+DG1]: Failed. Retval [8]
2010-01-25 11:11:12.571: [  OCRAPI][2151603648]procr_replace_dev: failed to replace device (8)
2010-01-25 11:11:12.571: [ OCRCONF][2151603648]The new OCR device [+DG1] cannot be opened
2010-01-25 11:11:12.571: [ OCRCONF][2151603648]Exiting [status=failed]...

C. $ORACLE_BASE/diag/asm/+asm/+ASMn/trace/alert_+ASMn.log, example:

Mon Jan 25 11:11:12 2010
Errors in file /opt/oracle/admin/diag/asm/+asm/+ASM1/trace/+ASM1_ora_22997.trc:
ORA-17502: ksfdcre:4 Failed to create file +DG1.255.1
ORA-15221: ASM operation requires compatible.asm of 11.1.0.0.0 or higher

ORA-15041: diskgroup "DG1" space exhausted

D. To verify ASM diskgroup free space and compatible setting, as grid user:

export ORACLE_SID=+ASMn
export ORACLE_HOME=home_of_grid_installation
$ORACLE_HOME/bin/sqlplus / as sysasm
SQL> set linesize 100
SQL> select inst_id, name, state, type, free_mb, substr(compatibility,1,10) compatibility from gv$asm_diskgroup where name='DG3' order by name,inst_id;

INST_ID  NAME                           STATE       TYPE      FREE_MB COMPATIBIL
---------  ------------------------------ ----------- ------ ---------- ----------
1                DG3                            MOUNTED     EXTERN       1134 11.2.0.0.0
2                DG3                            MOUNTED     EXTERN       1134 11.2.0.0.0

Miscellaneous

1. If you are trying to delete a non-exist OCR device, due to unpublished bug 8739774, ocrconfig fails with PROT-30, the error can be ignored; the bug has been fixed in 11.2.0.2 with new error PROT-34

2. To set compatible.asm to 11.2, log into ASM and execute:

ALTER DISKGROUP DG1 SET ATTRIBUTE 'compatible.asm' = '11.2';