on my esx service console, when i type in df -f I see
ilesystem Size Used Avail Use% Mounted on
/dev/cciss/c0d0p2 4.9G 1.6G 3.1G 34% /
/dev/cciss/c0d0p1 99M 32M 63M 34% /boot
none 131M 0 131M 0% /dev/shm
/dev/cciss/c0d0p7 1.6G 44M 1.5G 3% /var/log
But when I go to Virtual center and go to storage. I see
/vmfs/volumes/............ has 124.75 Gb partition
You'll want to use the command vdf - it will display vmfs and your other partitions.
try vdf