Duplicate filenames on RHEL

Issue

Duplicate filenames on RHEL5.4

# ls -il | head
total 15287884
4578596 -rw-r--r-- 2 rstraa users  75422883 Apr  2  2009 ex090401.log
4578596 -rw-r--r-- 2 rstraa users  75422883 Apr  2  2009 ex090401.log
4578587 -rw-r--r-- 2 root   root   70582251 Apr  3  2009 ex090402.log
4578587 -rw-r--r-- 2 root   root   70582251 Apr  3  2009 ex090402.log
4578602 -rw-r--r-- 2 root   root   62538572 Apr  4  2009 ex090403.log
4578602 -rw-r--r-- 2 root   root   62538572 Apr  4  2009 ex090403.log
4578632 -rw-r--r-- 2 root   root   59327424 Apr  7  2009 ex090406.log
4578632 -rw-r--r-- 2 root   root   59327424 Apr  7  2009 ex090406.log
4578634 -rw-r--r-- 1 root   root  260381945 Apr  8  2009 ex090407.log

# stat ex090401.log
  File: ex090401.log'
  Size: 75422883        Blocks: 147472     IO Block: 4096   regular file
Device: fd04h/64772d    Inode: 4578596     Links: 2
Access: (0644/-rw-r--r--)  Uid: (  503/  rstraa)   Gid: (  100/   users)
Access: 2010-03-27 16:57:14.000000000 +1100
Modify: 2009-04-02 00:00:00.000000000 +1100
Change: 2010-05-22 11:50:38.000000000 +1000
[root@HOLST-LOGPV01 rbaweb1]\# stat ex090402.log
  File:ex090402.log'
  Size: 70582251        Blocks: 138008     IO Block: 4096   regular file
Device: fd04h/64772d    Inode: 4578587     Links: 2
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2010-03-27 16:57:15.000000000 +1100
Modify: 2009-04-03 17:51:07.000000000 +1100
Change: 2010-05-22 11:50:24.000000000 +1000

# find /opt/logs/rbawebsite/rbaweb1 -name "ex090401.log"
/opt/logs/rbawebsite/rbaweb1/ex090401.log
/opt/logs/rbawebsite/rbaweb1/ex090401.log

# find /opt/logs/rbawebsite/rbaweb1 -name "ex090401.log" | while read filename ; do stat "$filename" ; done
  File: /opt/logs/rbawebsite/rbaweb1/ex090401.log'
  Size: 75422883        Blocks: 147472     IO Block: 4096   regular file
Device: fd04h/64772d    Inode: 4578596     Links: 2
Access: (0644/-rw-r--r--)  Uid: (  503/  rstraa)   Gid: (  100/   users)
Access: 2010-05-29 08:45:06.000000000 +1000
Modify: 2009-04-02 00:00:00.000000000 +1100
Change: 2010-05-22 11:50:38.000000000 +1000
  File:/opt/logs/rbawebsite/rbaweb1/ex090401.log'
  Size: 75422883        Blocks: 147472     IO Block: 4096   regular file
Device: fd04h/64772d    Inode: 4578596     Links: 2
Access: (0644/-rw-r--r--)  Uid: (  503/  rstraa)   Gid: (  100/   users)
Access: 2010-05-29 08:45:06.000000000 +1000
Modify: 2009-04-02 00:00:00.000000000 +1100
Change: 2010-05-22 11:50:38.000000000 +1000
The following problems refer to our production virtual machine server HOLST-LOGPV01.

Unmounted /opt and Run "e2fsck -f /dev/os/opt" did not fix the issue.

Reboot did not fix the issue.