We are using RHEL ES 3.0 Update 6, kernel version is 2.4.21-37.ELsmp. We have 5-node Oracle 10g RAC (10.1.0.4). # cat /proc/ocfs/version 1.0.14-PROD1 Fri Jan 7 13:58:41 PST 2005 (build 7a10bc19875bb2abf8a7fd110639b81b) One problem with ocfs v1 here is that when I used "debugocfs -h /dev/emcpowere1" command, it always show that "curr_master=INVALID_MASTER". My question is: Is this a serious problem? Is it Ok to ignore this message? Another problem is that I created some sub-folders on one node (db1), and 4 nodes (db1,db2,db3,db4) can see these directories, but db5 node just could not see those folders. On node 5: $ ls -di /oradata/data15/hotbackup/ 162848768 /oradata/data15/hotbackup/ On node 4: ls -di /oradata/data15/hotbackup/ 266133504 /oradata/data15/hotbackup/ On node 3: $ ls -di /oradata/data15/hotbackup/ 266133504 /oradata/data15/hotbackup/ On node 2: $ ls -di /oradata/data15/hotbackup/ 266133504 /oradata/data15/hotbackup/ On node 1: $ ls -di /oradata/data15/hotbackup/ 266133504 /oradata/data15/hotbackup/ But all 5 nodes are working fine on other files/folders on /oradata/data15. What could be the problem? Thanks, Hai