A part of the disk space is unavailable: Only 37 GB out of 80GB is accessible. I have a vmware instance of CentOS setup with 80GB of Hard Disk space ( Preallocated). When I login to the system I only see 35 GB.
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$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
37G 35G 113M 100% /
/dev/sda1 99M 12M 83M 13% /boot
tmpfs 1.3G 0 1.3G 0% /dev/shm
$
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I'm in the process of setting up/ upgrading some tools and importing the databases. The db's are about 45 GB and I'm unable to continue with the new setup.

Have any of you seen similar issues before? If so, can you please help me? I'm currently unable to proceed.

Any help appreciated.

Thanks,
anu.

post the output of fdisk -l

[]# /sbin/fdisk -l

Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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 5221 41833260 8e Linux LVM
[]#

Thanks,
anu.

10443 cylinders and you're only using 5221.

Use fdisk/cfdisk/parted/gparted to create a new partition on the disk taking up all remaining space. lvextend VolGroup00 with /dev/sda3 (assuming it's 3), then resize2fs the filesystem. All while the everything is unmounted, so you'll need to boot from a LiveCD. (binary names may vary based on memory and OS version - google 'linux lvm extend' or something)

Thanks so much for your help/ pointers; I will try it. I really appreciate it.

Regards,
anu.