I suggest you use diagcollection.pl script to collect diagnostic information from an Oracle Grid Infrastructure installation.
This script is located u01/app/11.2.0/grid(Grid_Home)/bin/diagcollection.pl
Connect root user then run above mention script.
When invoked script

•crsData_hostname_date.tar.gz contains log files
•coreData_host_name_date.tar.gz contains core files
•ocrData_hostname_date.tar.gz files contains ocrdump and ocrcheck also show OCR backups.
•osData_hostname_date.tar.gz contains operating system logs

You can use scripts -collect option. If you want to clean local directory use -clean option

/u01/app/11.2.0/grid/bin/diagcollection.pl –collect