Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

As my D: disk is almost full (2TB) I extended the FC lun to 2.5TB. The new 500Go are seen by windows as "Unalloacted" as expected.

I tried to extend the volume but windows says

There is not enough space available on the disk(s) to complete this operation

I read on the web that the disk should be configured as GPT and as a dynamic but it's already a dynamic GPT disk.

How can I extend my disk without any data loss? My operating system is Windows 2008 R2 x64 SP1 and the SAN is a 3PAR

share|improve this question


I had to do a "Rescan disks" and then the extension worked!

share|improve this answer
Solved indeed!, rescan of the disk was the trick! Many thanks – user220530 May 21 '14 at 6:52

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.