resize harddisk in Vmware

I could resize by using edit in config in vmware client  my boot c-drive from a wmware Windows server  (32 --> 100 giga)
It will show in edit new size,  but when i power up server  , c-drive still shows old size 32 giga
How to "let windows see"  the new size off 100 giga on this boot partition

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Neil RussellTechnical Development LeadCommented:
Windows server version?
Sam SawalhiIT ConsultantCommented:
If your resized virtual disk is bootable, you cannot use diskpart from the virtual machine itself. Use a 3rd party tool or use another virtual machine. Here I describe how to use diskpart.exe with a 2nd virtual machine.

    Add the increased virtual hard disk to a second virtual machine;

    Power on this 2nd virtual machine;

    Open a Command Prompt and type:

    list volume

    Remember the volume number (#) of your volume!

    select volume <volume number> (the number from step 8)


    Turn off this 2nd virtual machine and remove the virtual hard disk from the virtual machine configuration. This won't delete the hard disk file from disk;

    Your now finished! You can boot your VM with the resized disk. Windows automatically recognizes the new and correct disk and volume size.

Hope this helps!

Thank you,
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You need to resize the partition with the Operating System.


How to Resize a Partition after Disk Expansion

To re-size a disk, select the Virtual Machine, Select Edit Settings, Highlight the Virtual Hard Disk, and select Edit
there is an option to increase size. This only changes the physical size of the virtual disk, it does not grow the partition on the disk. See below.

Before making any changes to the partition structure of the disk, ensure you have a full backup, not a snapshot.

1. Resize partition with Gparted Live CDROM

i. Download Gparted Live CDROM (

ii. Upload the cdrom iso to the vSphere ESX/ESXi datastore.

iii. Mount the cdrom or iso on the virtual machine.

iv. Shutdown and restart the virtual machine booting from the cdrom.

v. Select Resize partition.

Here is a Tutorial Walkthorugh of how to resize a partition with a GParted Live CDROM

2. Using DISKPART.exe

(the system disk cannot be re-sized within the virtual machine, but other disks can be resized, eg. D: E: etc

i. Shutdown the virtual machine.
ii. Remove disks from virtual machine (but do not delete them).
iii. Add the disks to another virtual machine.
iv. Start up virtual machine.
v. Use Diskpart in the OS to extend disks.

see here for details on Diskpart usage

3.Use VMware Converter Standalone to complete a V2V (virtual to virtual conversion).
there is an option to increase or decrease the size of target disks on the desintation at conversion.

Download VMware vCenter Converter here

VMware vCenter Converter Standalone 4.x Documentation

VMware vCenter Converter Standalone 4.3 User Guide

For the conversion steps, read fellow Expert Bestway's article.

Best Practice Video Guide here

Also the VMware KB here
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BIAPROAuthor Commented:
Windows Server Standard no Hyper -V,   32 bit   Service Pack 2
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I prefer to use Gparted Live CDROM or Parted Magic, and boot VM from CDROM, and resize, quick and easy - done.
Neil RussellTechnical Development LeadCommented:
IF This is a windows 2008 server and you have added disk space already in VMWare. Just go to disk manager, right click on the C: Drive partition and select Extend volume.....

See here

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Neil RussellTechnical Development LeadCommented:
No need for any mouinting in other VM's, no need for 3rd party tools. it takes about 2 mins from start to end.
BIAPROAuthor Commented:
Great!! took 30 seconds!  you saved my day!
Happy New Year
regards Jack
Neil RussellTechnical Development LeadCommented:
Your welcome.  It's suprising how many people still don't know you can do this now. Saves a LOT of time.
BIAPROAuthor Commented:
True , I was reading all the manuals from Vmware, does not tell either, but  really , you saved my day!
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