Increase C drive partition on Amazon EC2

Why?  You shouldn't be storing data on the C: drive.

While I may be misremembering, I saw a presentation that led me to believe the C drive is subject to wiping and resetting should the system become corrupt (or something else happens).  I would suggest you contact Amazon and make sure you understand how the storage space is allocated and handled.

Maybe EASEUS Partition manager could do the trick.

Leew,

Thats what i found while trying to additional disk space to C drive. It says OS will be formatted as it it get convers to dynamic from basic.
One of Amazon executive says its possible to expand it. As we are still in testing process we have not subscribed for support to check with Amazon. Thanks for the suggestion.

I don't know that this is a support question... in theory, sales should know the answer to this...

I see a few categories in this question so not sure if you're talking physical or virtual. Clearly WIndows though. As others have said, C: is not extendable using Diskpart if you're using Win2003. Win2008 supports it fine.  http://support.microsoft.com/kb/325590

If that doesn't work and you have a physical machine and space on your disk you could use GParted to extend your partition. If virtual you can use this common trick to mount your boot partition as a data partition of another machine then extend it that way. It's clunky but beats reinstalling Windows.

http://www.xtralogic.com/extend_fs_part.shtml

Solution was found by my self