Once u got this check filesystem to have enough disk space with running df -h In my case I had over 27% free but still got the same error, then look at Inodes: bash-3.2# df -o i /opt Filesystem iused ifree %iused Mounted on /dev/dsk/c1t0d0s5 4280640 0 100% /opt Catcha! Ok now we must find that busty folder with a lot of files # for i in /opt/*; do echo $i; find $i |wc -l; done This command will list directories and number of files in them. Once you see a directory with unusually high number of files (or command just hangs over calculation for a long time), repeat the command for that directory to see where exactly the small files are. repeat it until you will have bash-3.2# for i in /opt/oracle/app/oracle/product/grid/rdbms/*; do echo $i; find $i |wc -l; done /opt/oracle/app/oracle/product/grid/rdbms/admin 1683 /opt/oracle/app/oracle/product/grid/rdbms/audit 4229135 /opt/oracle/app/oracle/product/grid/rdbms/demo 2 /o