Disk Management - Shrink Partition

ByLine
How to Shrink and Create a Partition with Disk Management in Vista
Synopsis
It is possible in Vista to repartition your hard disk by using the Shrink feature in Disk Management. You can shrink an existing partition (volume) to create unallocated disk space, from which you can Create a new partition (volume).
How to Shrink and Create a Partition with Disk Management in Vista

information   Information
It is possible in Vista to repartition your hard disk by using the Shrink feature in Disk Management. You can shrink an existing partition (volume) to create unallocated disk space, from which you can Create a new partition (volume). For more information, see: Windows Help and How-to: Partition and Understanding Disk Partitioning

Partition Type

Description

Primary Partition

A type of partition created on a hard drive that can host an operating system and functions as though it were a physically separate hard drive. Also called a volume. Only up to four primary partitions, or 3 primary partitions and 1 extended partition can be created on a single hard drive. Primary partitions can be used to install and start an operating system. If you want to create more than three partitions, the fourth partition is created as an extended partition. See: Windows Help and How-to: What are system partitions and boot partitions? and The Storage Team at Microsoft - File Cabinet Blog : Understanding the error message "There is not enough space available on the disk(s) to complete this operation" when you create a volume

Extended Partition

A type of partition on a hard drive that should be used if you want to create more than four Primary partition. Extended partitions can contain multiple logical drives that can be formatted and have drive letters assigned to them. An extended partition is a container that can hold one or more logical drive. Logical drives function like primary partitions except that they cannot be used to start an operating system. This option has been removed in Disk Management for Vista. For how, see: The Storage Team at Microsoft - File Cabinet Blog :How to create an extended partition in Windows Vista (Click Yes for Security Information)
warning   Warning
You will not lose any data on the partition (volume) that you are shrinking. You must be logged on as an administrator to perform these steps.
Tip   Tip
The default location for Disk Management is C:\Windows\System32\diskmgmt.msc.


EXAMPLE: Before and After with a New Partition Volume
One_Volume.jpg
New_Volume.jpg




STEP ONE
To Shrink a Partition

1. Open the Control Panel. (Classic View)​
A) Click on the Administrative Tools icon.​
B) Click on Computer Management.​

2. Click on Continue in the UAC prompt.​
3. In the left pane, click on Disk Management under Storage. (See screenshot below step 4)​
4. Right click on the volume (EX: C:\ ) your want to shrink and click on Shrink Volume.​
Disk_Management_Shrink.jpg

5. You will now see this for a moment. (See screenshot below)​
NOTE: It is verifying that there is enough free space on the disk to create a new partition.
Querying.jpg

6. Enter the amount of space in MB (1024 MB = 1 GB) to shrink by, from the available free space on this volume, for the new partition and click Shrink. (See screenshot below)​
NOTE: The value in the Total Size Before Shrink box indicates the current size of the partition and the value in the Size of Available Shrink Space indicates the maximum size that you can allocate to the new second partition.
warning   Warning
The size of the available space can be restricted by the amount of space currently allocated to on the hard drive for the virtual memory page file, System Restore max size, and hibernation files. The location of the files on the hard drive plays a big part here because these files are marked as unmovable, and Disk Management is unable to relocate them. As such, if these unmovable files are located in the middle of the total amount of free space on the disk, then only the amount of free space on the other side (to the right) of these files will actually be available for the new partition. This will result in you showing that you have x amount of free space, but not being able to use it for your partition. The only way around this is to use a 3rd party hard drive partition management program, or setup the partition when installing Vista.
warning   Warning

If you wish to force the partition to shrink, then see: the How-To Geek: Working Around Windows Vista's "Shrink Volume" Inadequacy Problems
Shrink.jpg

7. After a few minutes, you will see the new unallocated (unformated) partition. (See screenshot below)​





STEP TWO
To Create a New Partition from Unallocated Space

8. Right click on the new Unallocated partition and click on New Simple Volume. (See screenshot below)​
Disk_Management_Simple.jpg

9. The New Simple Volume Wizard will now appear. Just click on Next. (See screenshot below)​
NOTE: This wizard will make the new unallocated partition usable when finished.
Simple_Wizard_Welcome.jpg

10. Enter the volume size you want for the new partition and click Next. (See screenshot below)​
NOTE: Unless you are going to shrink this new partition, you should use the Maximum disk space in MB.
Specify_Volume_Size.jpg

11. Dot Assign the following drive letter. (See screenshot below)​
A) Select a drive letter for the new partition.​
B) Click on Next.​
Drive_Letter.jpg


12. Dot Format this volume using the following settings. (See screenshot below)​
NOTE: This may take a while to format the new partition volume.
A) Enter a name for the new partition under Volume label.​
B) To save time, check Perform a quick format.​
C) Click on Next.​
Format_New_Partition.jpg


13. Click on Finish when the Succesfully Completed window pops up. (See screenshot below)​
Completing_Wizard.jpg

14. You will now see the Disk Management console with the new partition volume ready to be used. (See screenshot below)​
Disk_Management_New_Partition.jpg

15. Close Computer Management.​
16. Click on Computer in the Start Menu and see your new partition volume. (See screenshot below)​
New_Volume.jpg

That's it,
Shawn




 
Last edited by a moderator:
Shawn Brink

Comments

can any one help me? ininally i don't had enought information on shrink partition.so while shrinking inialy sizw avilable for shrink was 333281mb and enter the amount of space to srink was also 333281mb. THEN I CLICKED SRINK BOTTOM.
but i want to make 4 partition. now again when i tried to srink . the amount of srink avilable alwas shows 0MB .. how can i solve this problems

can i think now i have only single patition, cann i delate it...and make atleast 4 partitionn that vista support
 
Hello Neezan, and welcome to Vista Forums.

Could you postback with a screenshot of your Disk Management? This way we can see your drive layout to be able to help better. :)
 
i have total of 468.72BG avilable hard disk. of which using computer management ,srink i creat to dreive C & E which has 32.47&140.29 respectively as in attached 1. i want to make futher partition of drive C into other 3 partition but it is simple unable to locate the space as in attached file 2
 

Attachments

Last edited:
have total of 468.72BG avilable hard disk. of which using computer management ,srink i creat to dreive C & E which has 32.47&140.29 respectively as in attached 1. i want to make futher partition of drive C into other 3 partition but it is simple unable to locate the space as in attached file 2
Attached Thumbnails


 
Hi Shawn,

After so many try and try. . .finally it works. I use the PARTITON WIZARD HOME EDITION. it failed so many times specially during resizing my primary. It takes time for me to figureout the problem, and it only needs addition free space.

I really appreciate your help.

Maraming salamat :),
Julius
 
hi brink, so does this guide basically cut the c:\ in half so i get 2 of equal sizes and one that has everything i have installed and stuff, and one that is empty (the new one)?
 
Hello Poolwizard,

If you shrink the drive in half first and create a new partition with the unallocated space, then yes. :)
 
hi,

im thinking of doing this, but when i right click my c:/ and click shrink volume, after it has finished querying shrink space, the maximum MB is only 60, when my c:/ is 584 GB, is there something wrong?

the status of c:/ is healthy
 
I've tried this disk management but it's odd i cant combine the free space which is released from drive d: and the system partition c: together...
 
Hello Esther, and welcome to Vista Forums.

Could you post a screenshot of your Disk Management window showing the full layout of your HDDs? This will help us determine what the issue may be. :)
 
Just wanted to say THANKS for this excellent guide.
Took me less than 10 min. to make my partition, and that was with me reading everything very carefully and moving very slowly.
I appreciate this excellent guide and all your excellent help.
 
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