[INS-30100] Insufficient disk space on the selected location (/app01/grid).
Cause:
While installing grid software, due to lack of permissions, got the error below
lack of oracle permission
drwxr-xr-x. 3 root root 4096 Sep 2 20:14 u01
Workaround:
Grant ownership and rwx permission to directory
[root@dgprim01 /]# chmod -R 775 /u01/
[root@dgprim01 /]# chown -R oracle:oinstall /u01/