One of our DBA's recently noticed that there is a duplicate mount points. Being new to linux, I know I'm guessing I have to dismount, rename and mount again?
Can someone please confirm these steps for me.
Thanks.

df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
35G 8.4G 25G 26% /
/dev/hda1 99M 26M 69M 28% /boot
tmpfs 16G 0 16G 0% /dev/shm
/dev/mapper/VolGroup00-sda5
50G 180M 47G 1% /sybaselog
/dev/mapper/VolGroup00-sda3
247G 22G 212G 10% /sybasedev
/dev/mapper/VolGroup00-sda4
50G 180M 47G 1% /sybaselog
10.1.254.230:/share/IBRM
689G 242G 448G 36% /ldnas4

I hate to quibble, but what you have is two devices mounted to the SAME mountpoint---it is interesting to note that this is perfectly legal (but probably not what you want... ) If I am not mistaken, what you will see when accessing /sybaselog depends on the order in which the devices were mounted.

Regardless. your asssumption is (almost)correct. unmount BOTH devices from sybaselog, then create a new mountpoint (or select an existing) for one of them, finally, remount as needed

Thanks. I did just and and it seems to have resolved the issue.