There is plenty of space on the VCenter server, as both the C: and D: have over 50G of free space
here is the vdf -h on the esx
Filesystem Size Used Avail Use% Mounted on
/dev/sdg5 4.9G 1.7G 2.9G 37% /
/dev/sdg2 2.0G 63M 1.8G 4% /var/log
/dev/sdd1 99M 72M 23M 76% /boot
/dev/sdd3 7.7G 1.5G 5.9G 21% /esx3-installation
/dev/sdd1 99M 72M 23M 76% /esx3-installation/boot
/dev/sdd6 5.8G 102M 5.4G 2% /esx3-installation/var/log
/vmfs/devices 740G 0 740G 0% /vmfs/devices
/vmfs/volumes/2e9982c5-879f6307 1.1T 511G 571G 47% /vmfs/volumes/System Admin
/vmfs/volumes/4806ed25-f42372c4-0395-001aa00d1b7c 2.0T 1.5T 509G 74% /vmfs/volumes/Isan1
/vmfs/volumes/487dd6aa-04d4caf8-3cb9-00151724537a 2.0T 1.5T 413G 79% /vmfs/volumes/SAN1
/vmfs/volumes/48e1e41f-9d5b5560-6129-00221908552a 635G 8.5G 626G 1% /vmfs/volumes/vert4:storage1
/vmfs/volumes/4970a4fc-0c39e420-1f32-00151724537a 1.3T 815G 521G 61% /vmfs/volumes/SAN2
/vmfs/volumes/498cec8e-72b5ad2a 1.1T 511G 571G 47% /vmfs/volumes/Software
/vmfs/volumes/4a32a4aa-d46057ba-1ae2-00151724532a 2.0T 1.3T 713G 64% /vmfs/volumes/FCSan3-1
/vmfs/volumes/4a32a805-6eee8883-7959-00151724532a 1.3T 652G 722G 47% /vmfs/volumes/FDSan3-2