C:\Program Files\VMware\VMware Server>vmware-vdiskmanager.exe
VMware Virtual Disk Manager - build 44356.
Usage: vmware-vdiskmanager.exe OPTIONS diskName | drive-letter:
Offline disk manipulation utility
  Options:
     -c                   : create disk; need to specify other create options
     -d                   : defragment the specified virtual disk
     -k                   : shrink the specified virtual disk
     -n <source-disk>     : rename the specified virtual disk; need to
                            specify destination disk-name
     -p                   : prepare the mounted virtual disk specified by
                            the drive-letter for shrinking
     -q                   : do not log messages
     -r <source-disk>     : convert the specified disk; need to specify
                            destination disk-type
     -x <new-capacity>    : expand the disk to the specified capacity

     Additional options for create and convert:
        -a <adapter>      : (for use with -c only) adapter type (ide, buslogic or lsilogic)
        -s <size>         : capacity of the virtual disk
        -t <disk-type>    : disk type id

     Disk types:
        0                 : single growable virtual disk
        1                 : growable virtual disk split in 2Gb files
        2                 : preallocated virtual disk
        3                 : preallocated virtual disk split in 2Gb files

     The capacity can be specified in sectors, Kb, Mb or Gb.
     The acceptable ranges:
                           ide adapter : [100.0Mb, 950.0Gb]
                           scsi adapter: [100.0Mb, 950.0Gb]
        ex 1: vmware-vdiskmanager.exe -c -s 850Mb -a ide -t 0 myIdeDisk.vmdk
        ex 2: vmware-vdiskmanager.exe -d myDisk.vmdk
        ex 3: vmware-vdiskmanager.exe -r sourceDisk.vmdk -t 0 destinationDisk.vmdk
        ex 4: vmware-vdiskmanager.exe -x 36Gb myDisk.vmdk
        ex 5: vmware-vdiskmanager.exe -n sourceName.vmdk destinationName.vmdk
        ex 6: vmware-vdiskmanager.exe -k myDisk.vmdk
        ex 7: vmware-vdiskmanager.exe -p m:
              (A virtual disk first needs to be mounted at m:
               using the VMware Diskmount Utility.)

C:\Program Files\VMware\VMware Server>vmware-vdiskmanager.exe -x 8.0Gb -t 1 "c:\Virtual Machines\DRBL_Xen\drbl_xen.vmdk"
Using log file C:\DOCUME~1\JAZZYA~1\LOCALS~1\Temp\vmware-Jazz Yao Tsung Wang-354
6887766\vdiskmanager.log
The old geometry C/H/S of the disk is: 768/128/32
Preserving old geometry.
Disk expansion completed successfully.

WARNING: If the virtual disk is partitioned, you must use a third-party
         utility in the virtual machine to expand the size of the
         partitions. For more information, see:
         http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=1647

C:\Program Files\VMware\VMware Server>