Cause of disappearing mount points in FC5

[Deepak Shrestha]

> Hi,
>
> what could be the cause of disappearing mounted drives? I have a
> "vfat" & "ntfs" drive mounted in my FC5 box but sometime after
> booting, the mount point disappears suddenly without any trace. I am
> suspecting the hardware problem but when I boot from windows these
> drive is working fine. Have anyone came across similar problem? any
> advice?
>
> Thanks!

Further information,

I mounted the drive manually as root and it mounted without any complain.
I guess the drive is mounting successfully after it suddenly disappers
means somthing is causing it to unmount automatically. What could
cause that?
Any suggestions please?