I have a virtualised version of Windows 7 Ultimate running on my Macbook Pro under VMware Fusion 4. The C drive having 50Gb was becoming quite full so I shut down the VM and allocated an additional 20Gb. After restarting I went in to disk manager and disk tools and saw the new partition was now 70Gb and fully extended, however if I right clicked the actual C drive it reported only 50Gb. Looking in the actual VM package from my Mac I could see the appropriate number of 2Gb vmdk files totalling 70Gb. This seemed very strange so I tried updating vmware tools, running chkdsk, rebooting all without success. In the meantime I allocated another 15Gb but still the actual C drive reported 50Gb in explorer but now disk manager report 85Gb.
I discovered that the ‘extend filesystem’ command in diskpart fixes this.
>diskpart
DISKPART> list disk
Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 85 GB 0 B
DISKPART> select disk 1
The disk you specified is not valid.
There is no disk selected.
DISKPART> list disk
Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 85 GB 0 B
DISKPART> select disk 0
Disk 0 is now the selected disk.
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Primary 84 GB 1024 KB
DISKPART> select partition 1
Partition 1 is now the selected partition.
DISKPART> list volume
Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 D DVD-ROM 0 B No Media
* Volume 1 C NTFS Partition 84 GB Healthy System
DISKPART> select volume 1
Volume 1 is the selected volume.
DISKPART> extend filesystem
DiskPart successfully extended the file system on the volume.
DISKPART>