Now that I read the title of this post, it sounds a touch dirty…
I had created a couple generic Win2k8 R2 VMs last week with 25GB OS drives. I hadn’t decided which services would be running on the boxes and 25GB would be more than enough for most applications. The only problem was that I had decided to install Sharepoint 2010 Foundation on one and SQL 2008 R2 on the other and both require 80GB of disk space. Good thing XenServer 5.6 and Window Server 2008 R2 make it easy to increase the disk size.
In XenCenter 5.6 select the virtual disk from the storage tab of the virtual machine, click Properties, select Size and Location, then increase the size of the disk.
Super simple, eh? This feature has been available for quite some time, v4.1 I believe, via the CLI but was exposed to the GUI in v5.6.
Now you need to extend the partition in Windows. Right click My Computer select Manage, select Disk Management, right click on the disk you want to extend, and select Extend. This starts the Extend Volume Wizard. Follow the prompts to complete the process. By default Win2k8 R2 extends the partition to the maximum available space available. So this wizard is just about clicking next, next, finish.
Take a look at the Citrix KB article for more info and additional instructions for the CLI procedure and how to extend a partition in Linux operating systems.
Note: Windows 2003 and XP are not able to extend the partition while the OS is running. You need to attach the disk to another VM and use DiskPart to extend the volume.
