Windows 2012 Expanding Cluster Volume Storage - Cluster Limit Failure

Posted on 2013-09-11
Medium Priority
Last Modified: 2013-09-12
OS is Windows 2012 and I am trying to extend a cluster volume storage partition from 10 TB to 20 TB.  I have the LUN at 20 TB and Windows sees the 20 TB disk in both Disk Management and in Failover Cluster Manager -> Storage -> Disks.

I am following the procedure in the this TechNet article:

When I run the extend command in DiskPart I get the following error:

Virtual Disk Service error:
The volume cannot be extended because the number of clusters will
exceed the maximum number of clusters supported by the file system.

I also get this same error when I try to extend the drive through Disk Management.

My disk partition is GPT so I should have a 256 TB storage limit.  

I've Googled around but could not find anything related to this issue for 2012.

Any suggestions on how to successfully extend my Cluster Storage Volume?


Question by:imalc3142
LVL 36

Accepted Solution

Seth Simmons earned 2000 total points
ID: 39484371
you can't expand the volume beyond 16tb because when it was originally created, windows used a 4k cluster size which means the largest size that volume can be is 16tb

you're only 2 options are either create a new volume beyond the 16tb boundary or backup the data, format the entire volume (windows would default to a larger cluster size to support a volume larger than 16tb) and restre the data

the 256tb maximum assumes a 64k cluster size


Author Closing Comment

ID: 39488508

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Issue: One Windows 2008 R2 64bit server on the network unable to connect to a buffalo Device (Linkstation) with firmware version 1.56. There are a total of four servers on the network this being one of them. Troubleshooting Steps: Connect via h…
A procedure for exporting installed hotfix details of remote computers using powershell
In this Micro Tutorial viewers will learn how to restore their server from Bare Metal Backup image created with Windows Server Backup feature. As an example Windows 2012R2 is used.
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question