How to Fix “Size Not Supported” Error in Server 2012?

July 20, 2017

This tutorial will show you how to fix “Size not supported” error when you resize partition (extending or shrinking) in Windows Server 2012 by allocating free space directly.

The Scenario and Cause

I’d like to increase the C drive partition space on the Windows Server 2012. It is 40 GB and I have only 50MBs left. There was no unallocated space so I deleted the data partition in order to create some space. However, when I try to extend C drive I get the error message: Error extending volume, size not supported. Any help will be appreciated.

After using Windows Server 2012 for a couple of years, you will find the system becomes full. You are likely to get low disk space warning when installing some large-size applications. It is imperative to extend system drive under this circumstance. Deleting data partition and then extend system partition with that space is workable solution. Nevertheless, you may get above error randomly. The solution is deleting the partition in “Computer Management”, and then you are able to extend the volume. While using powerful partitioning tool, there is no need to delete the partition. As a result, you have no probability of facing such perplex. Let’s see another example.

When I try to shrink partition size to smaller capacity using PowerShell cmdlet, it gave me an error says, Resize-Partition: Size Not Supported. What does that mean? And how can I resize the partition size successfully? Thanks.

When you encounter this error which probably means you try to shrink this partition to smaller than current used space. Shrinking or extending could be confusing in PowerShell because it uses different unit byte instead of MB. You can input “SizeMin” and “SizeMax” to identify how much space you can shrink by and then redo the task. Alternatively, you can do all of operations in simple, graphical and neat interface of some third party tools.

Fix “Extend Volume, Size Not Supported” with AOMEI Partition Assistant

AOMEI Partition Assistant Server is a trusty partitioning tool that designed for Windows Server OS, such as Server 2003, 2008, 2011, 2016 and of course Server 2012 (R2). It will help you solve “Size Not Supported” failed issue by using another way of partition resizing. There are two outstanding features of this software in resizing partition, you don’t have to stop current running programs and it will not ask for reboot after adjusting. These two reduce the downtime of Server to a great extent. More helpful functions like move partition, split partition, merge partitions, align partition, quick partition, also for advanced users, command line partitioning are embedded in this software.

What’s more, AOMEI Partition Assistant supports various device types. Except for common HDD, SSD, SSHD, it supports all hardware RAID (RAID 0/1/5/10) and virtual disk partition in VMware, Virtual Box, and Virtual PC and so on. So feel free to download its free trial and learn how to resize Server 2012 partition without losing data and format.

Expand system volume in Server 2012 via AOMEI Partition Assistant

Step1. Install and launch AOMEI Partition Assistant. If you want to extend partition into non-adjacent space on the hard drive, complete it with “Merge Partitions”. The unallocated space could be recognized in the process. If you have free space in data partition instead of unallocated space, right click the redundant data partition and select “Allocate Free Space”.

Allocate Free Space

Step2. Specify the value and select C drive as the destination.

Allocate Free Space set

Step3. Click “Apply” and review the pending operations. At last, click “Proceed” to execute them.

Apply Proceed

Many solutions are practicable in resizing partition in Windows Server 2012. So when you face “Resize Partition: Size Not Supported” or “Error extending volume: Size Not Supported” issue, it’s not a bad idea to turn to third party software. In addition, AOMEI Partition Assistant Server also supports Windows PC OS like Windows 10, Windows 7 and Windows XP. Thus, installing Windows 10 on external hard drive is quite easy as well.