Is there is any risk to use Dynamic disk in guest OS , I want to resize the vmdk for one of our VM and to add enlarge the partition i can convert the disk from basic to dynamic or I can use partition tool to do the same but keeping the disk as basic , which one is good and I heard the dynamic disk has many problem .
I would definitely convert AFTER the full backup. We have done it during the maintenance window. If there is data on the disk that it requires a reboot before you can access it again
Works fine for us. there were large disks 400GB +
You can try some of the methods in the below link instead of using dynamic disks...
If the disk you art trying to resize is not the boot disk. Then you can use diskpart as follwos
Run cmd and then type diskpart
type: list volume. Take a not of the volume number of the disk to be extended.
type: select volume volume-number
type: extend followed by the megabytes to be added i.e. extend 100 this will extend the volume with 100 MB
Your site seems to focus very heavily on expanding a system disk. Most of the environments I've been involved in have been well-behaved, where clients created VMs with discrete system and data disks. In that case, the data disk can be extended on-line using the steps in http://support.microsoft.com/kb/325590.
May I make a suggestion that you add an exception near the top of the list that, if you're not extending the system partition, you don't need to go through the trauma of booting into a Linux boot disk or a second operating system?