Expand Disk

Posted on 2011-05-11
Last Modified: 2012-05-11

Is it possible to increase the size of the disk R using the Unallocated space, without lose my Exchange data? See image below.

Question by:andersoncaraujo

    Author Comment

    LVL 4

    Expert Comment

    Yes, you can expand the disk as long as it is not the actual operating system boot partition.  Yes, there is a way to do that too .. but that is not part of this question.

    Please refer to Microsoft KB article 325590 (

    I would recommend the following:

    1). make a full backup of your data on drive R.
    2). if you own cloning software, clone the R drive to another disk as a backup as well.
    3). if you have access to third party partitioning software (there is both paid and free versions available), use that software instead of diskpart.exe.

    From a personal note, you will need to dismount the exchange store and I would also stop all exchange related services (that is what I did).  I also would recommend the third party partition software.  I did use diskpart.exe just to see if it would work and it did work.

    Author Comment

    What software should I use to do that?

    Expert Comment

    The Server that support the Exchange Data Base is a virtual machine or a fisical computer?

    You can use diskpart to identify the volume and use extend.

    If you need extend the system partition you can use the Dell Tool  name extpart.

    Expert Comment

    LVL 10

    Accepted Solution

    Go to Diskpart and run below commands to extend the partition

    1. Open Command prompt
    2. run diskpart
    3. select disk <disk number>
    4. list partition and note the partition number
    5. select partition <partition number>
    6. extend

    From Disk management (diskmgmt.msc) you can find the disk number.
    LVL 46

    Expert Comment

    Can easily be done with DiskPart.exe
    Instructions from Microsoft:

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