DiskPart.exe utility cannot extend logical drive

Posted on 2007-10-16
Last Modified: 2013-03-03

Server: HP ProLiant ML350 G3

I installed an additional HDD, added it to the array and expanded the logical disk.  I was then left with unused disk space right after the C: drive and ran diskpart.exe to expand the volume.  However, I got the following error:

The volume you have selected may not be extended.
Please select another volume and try again.

This appears to be the same error described in MS KB841650:

However, it is not as I am running SP2 which includes the mentioned hotfix.

Thank you.
Question by:ntahall
    LVL 55

    Accepted Solution

    Diskpart cannot extend C:, you'll have to use something like to extend it online or just create a new volume and move some data onto that.

    Author Comment

    Thanks andyalder

    Are there no MS or free utilities to undertake this task?

    Kind regards
    LVL 55

    Expert Comment

    BootitNG free trial works, after yuo make the CD and boot from it chose not to install it, then it runs from CD and allows offline expansion.

    Expert Comment

    Hot fix ( does not support for windows 2003 server SP1 and SP2.

    Disk part.exe is not advised to use on windows 2003 server. use Dell EXTPART ( This is free, simple and awesome tool to extend disk on windows 2003 server boxes. it is just an instant run .exe file.

    To install the utility, perform the following steps:

    1) Download the self-extracting executable ExtPart.exe from
    2) Run the self-extracting executable to extract the utility (extpart.exe) to the hard disk of your system. The default extract location is c:\dell\ExtPart.
    3) Navigate the extract location directory ( c:\dell\ExtPart.) through command prompt.
    4) Refer the attached file.

    IMS Wintel

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