/boot shows nothing and 100% full (corrupted?)

Hi Linux gurrus

hope you all will be doing well.

Well I am facing a problem first time in my sys admin experience. I am using RHEL-4, I am unable to access /boot partition. when i try to access this partion or want to show its contents, It seems /boot is corrupted. see the following outputs

#ls /boot/
9?^?????tdÜ°??????4?çj?

#df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
145G 98G 40G 72% /
/dev/sda1 1.4T 1.4T 0 100% /boot
none 501M 0 501M 0% /dev/shm

Note: its showing the wrong entries /dev/sda1 (1.4T) and its 100% full.

#fdisk -l

Disk /dev/sda: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 9726 78019672+ 8e Linux LVM

Disk /dev/sdb: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 9726 78124063+ 8e Linux LVM

Can any body help me whats wrong with /boot? Number of applications are being run (24x7) on this server. I cant reboot it and cant interrupt the running applications. Can any body tell me what should i do now?

Server's info:

#cat /etc/redhat-release
Red Hat Enterprise Linux ES release 4 (Nahant Update 5)

# uname -r
2.6.9-11.ELsmp

waiting for an early response.

Thanks
Sam