change_disk [Xenmodule Wiki]

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====== VM Change Disk Size ======

you can change VM Disk Size from your admin panel .
{{ :wiki:change_disk_button.png?400 |}}

  *  current XenServer Version doesn't allow Size shrinking for now , so you can only enlarge the size.
  *  remember that this command will reboot your vm 
  *  if you want to change disk size, please put the new __entire size__ disk size , and not only the additional size.


----

after increasing your VM disk size , a new __unallocated area__ will be added to this vm Disk , our xenicastart script on your VM will automatically expand the default disk with this extra space after automatic reboot.
 
if for any reason this mechanism is not worked perfectly , you still can allocated it manually either by adding it to an existing drive or to create a new drive for it :

__Windows VMs :__

from vm control panel > administrative tools > computer management > Disk management
you will find the unallocated part , from here you can create as new drive or you can expand the previous drive with its space :
{{ :extend_disk.png?400 |}}


__Linux VMs :__

for CentOS6 :
<code>pvcreate VolGroup /dev/xvda4
 vgextend VolGroup /dev/xvda4
 lvextend -r -l +100%FREE /dev/mapper/VolGroup/lv_root</code>