Troubleshooting and Diagnostic Output for CVU

This section describes the following troubleshooting topics for CVU:

Enabling Tracing

CVU generates trace files unless you disable tracing. You can disable tracing by setting the SRVM_TRACE environment variable to false or FALSE. For example, in tcsh an entry such as setenv SRVM_TRACE FALSE disables tracing.

The CVU trace files are created in the ORACLE_BASE/crsdata/host_name/cvu directory by default. Oracle Database automatically rotates the log files and the most recently created log file has the name cvutrace.log.0. You should remove unwanted log files or archive them to reclaim disk place if needed.

Oracle Clusterware stores log files that CVU generates when it runs periodically in the ORACLE_BASE/crsdata/host_name/cvu/cvutrc directory.

To use a non-default ___location for the trace files, set the CV_TRACELOC environment variable to the absolute path of the desired trace directory.

Known Issues for the Cluster Verification Utility

This section describes the following known limitations for Cluster Verification Utility (CVU):

Database Versions Supported by Cluster Verification Utility

The current CVU release supports only Oracle Database 10g or higher, Oracle RAC, and Oracle Clusterware; CVU is not backward compatible. CVU cannot check or verify Oracle Database products for releases before Oracle Database 10g.

Linux Shared Storage Accessibility (ssa) Check Reports Limitations

The current release of cluvfy has the following limitations on Linux regarding shared storage accessibility check.

OCFS2 (version 1.2.1 or higher) is supported.
For sharedness checks on NAS, cluvfy commands require you to have write permission on the specified path. If the user running the cluvfy command does not have write permission, then cluvfy reports the path as not shared.

Shared Disk Discovery on Red Hat Linux

To perform discovery and shared storage accessibility checks for SCSI disks on Red Hat Linux 5.0 (or higher) and Oracle Linux 5.0 (or higher), and SUSE Linux Enterprise Server, CVU requires the CVUQDISK package. If you attempt to use CVU and the CVUQDISK package is not installed on all of the nodes in your Oracle RAC environment, then CVU responds with an error.

Perform the following procedure to install the CVUQDISK package:

Login as the root user.
Copy the package, cvuqdisk-1.0.9-1.rpm (or higher version) to a local directory. You can find this rpm in the rpm subdirectory of the top-most directory in the Oracle Clusterware installation media. For example, you can find cvuqdisk-1.0.9-1.rpm in the directory /mountpoint/clusterware/rpm/ where mountpoint is the mount point for the disk on which the directory is located.
```
# cp /mount_point/clusterware/rpm/cvuqdisk-1.0.9-1.rpm /u01/oradba
```
Set the CVUQDISK_GRP environment variable to the operating system group that should own the CVUQDISK package binaries. If CVUQDISK_GRP is not set, then, by default, the oinstall group is the owner's group.
```
# set CVUQDISK_GRP=oinstall
```
Determine whether previous versions of the CVUQDISK package are installed by running the command rpm -q cvuqdisk. If you find previous versions of the CVUQDISK package, then remove them by running the command rpm -e cvuqdisk previous_version where previous_version is the identifier of the previous CVUQDISK version, as shown in the following example:
```
# rpm -q cvuqdisk
cvuqdisk-1.0.2-1
# rpm -e cvuqdisk-1.0.2-1
```
Install the latest CVUQDISK package by running the command rpm -iv cvuqdisk-1.0.9-1.rpm.
```
# cd /u01/oradba
# rpm -iv cvuqdisk-1.0.9-1.rpm
```